diff --git a/helloworld/src/main/resources/log4j.properties b/helloworld/src/main/resources/log4j.properties
index dfcff8ca09..f258dfda9b 100644
--- a/helloworld/src/main/resources/log4j.properties
+++ b/helloworld/src/main/resources/log4j.properties
@@ -39,7 +39,7 @@ log4j.logger.com.github.fommil.netlib=ERROR
 log4j.logger.org.apache.avro.mapreduce.AvroKeyInputFormat=ERROR
 
 # TransmogrifAI logging
-log4j.logger.com.salesforce.op=INFO
+log4j.logger.com.salesforce.op=ERROR
 log4j.logger.com.salesforce.op.utils.spark.OpSparkListener=OFF
 
 # Helloworld logging
diff --git a/helloworld/src/main/scala/com/salesforce/hw/OpTitanicSimple.scala b/helloworld/src/main/scala/com/salesforce/hw/OpTitanicSimple.scala
index 100c43b320..2ce5d033e1 100644
--- a/helloworld/src/main/scala/com/salesforce/hw/OpTitanicSimple.scala
+++ b/helloworld/src/main/scala/com/salesforce/hw/OpTitanicSimple.scala
@@ -90,8 +90,8 @@ object OpTitanicSimple {
     println(s"Using user-supplied CSV file path: $csvFilePath")
 
     // Set up a SparkSession as normal
-    val conf = new SparkConf().setAppName(this.getClass.getSimpleName.stripSuffix("$"))
-    implicit val spark = SparkSession.builder.config(conf).getOrCreate()
+    implicit val spark = SparkSession.builder.config(new SparkConf()).getOrCreate()
+    import spark.implicits._ // Needed for Encoders for the Passenger case class
 
     ////////////////////////////////////////////////////////////////////////////////
     // RAW FEATURE DEFINITIONS
@@ -125,18 +125,16 @@ object OpTitanicSimple {
     val passengerFeatures = Seq(
       pClass, name, age, sibSp, parCh, ticket,
       cabin, embarked, familySize, estimatedCostOfTickets,
-      pivotedSex, ageGroup
+      pivotedSex, ageGroup, normedAge
     ).transmogrify()
 
     // Optionally check the features with a sanity checker
-    val sanityCheck = true
-    val finalFeatures = if (sanityCheck) survived.sanityCheck(passengerFeatures) else passengerFeatures
+    val checkedFeatures = survived.sanityCheck(passengerFeatures, removeBadFeatures = true)
 
     // Define the model we want to use (here a simple logistic regression) and get the resulting output
-    val prediction =
-      BinaryClassificationModelSelector.withTrainValidationSplit(
-        modelTypesToUse = Seq(OpLogisticRegression)
-      ).setInput(survived, finalFeatures).getOutput()
+    val prediction = BinaryClassificationModelSelector.withTrainValidationSplit(
+      modelTypesToUse = Seq(OpLogisticRegression)
+    ).setInput(survived, checkedFeatures).getOutput()
 
     val evaluator = Evaluators.BinaryClassification().setLabelCol(survived).setPredictionCol(prediction)
 
@@ -144,30 +142,20 @@ object OpTitanicSimple {
     // WORKFLOW
     /////////////////////////////////////////////////////////////////////////////////
 
-    import spark.implicits._ // Needed for Encoders for the Passenger case class
     // Define a way to read data into our Passenger class from our CSV file
-    val trainDataReader = DataReaders.Simple.csvCase[Passenger](
-      path = Option(csvFilePath),
-      key = _.id.toString
-    )
+    val dataReader = DataReaders.Simple.csvCase[Passenger](path = Option(csvFilePath), key = _.id.toString)
 
     // Define a new workflow and attach our data reader
-    val workflow =
-      new OpWorkflow()
-        .setResultFeatures(survived, prediction)
-        .setReader(trainDataReader)
+    val workflow = new OpWorkflow().setResultFeatures(survived, prediction).setReader(dataReader)
 
     // Fit the workflow to the data
-    val fittedWorkflow = workflow.train()
-    println(s"Summary: ${fittedWorkflow.summary()}")
+    val model = workflow.train()
+    println(s"Model summary:\n${model.summaryPretty()}")
 
     // Manifest the result features of the workflow
     println("Scoring the model")
-    val (dataframe, metrics) = fittedWorkflow.scoreAndEvaluate(evaluator = evaluator)
+    val (scores, metrics) = model.scoreAndEvaluate(evaluator = evaluator)
 
-    println("Transformed dataframe columns:")
-    dataframe.columns.foreach(println)
-    println("Metrics:")
-    println(metrics)
+    println("Metrics:\n" + metrics)
   }
 }
diff --git a/helloworld/src/main/scala/com/salesforce/hw/iris/OpIris.scala b/helloworld/src/main/scala/com/salesforce/hw/iris/OpIris.scala
index cd450246a6..efd681f054 100644
--- a/helloworld/src/main/scala/com/salesforce/hw/iris/OpIris.scala
+++ b/helloworld/src/main/scala/com/salesforce/hw/iris/OpIris.scala
@@ -57,9 +57,9 @@ object OpIris extends OpAppWithRunner with IrisFeatures {
       val path = getFinalReadPath(params)
       val myFile = spark.sparkContext.textFile(path)
 
-      Left(myFile.filter(_.nonEmpty).zipWithIndex.map { case (x, number) =>
-        val words = x.split(",")
-        new Iris(number.toInt, words(0).toDouble, words(1).toDouble, words(2).toDouble, words(3).toDouble, words(4))
+      Left(myFile.filter(_.nonEmpty).zipWithIndex.map { case (x, id) =>
+        val Array(sepalLength, sepalWidth, petalLength, petalWidth, klass) = x.split(",")
+        new Iris(id.toInt, sepalLength.toDouble, sepalWidth.toDouble, petalLength.toDouble, petalWidth.toDouble, klass)
       })
     }
   }
diff --git a/helloworld/src/main/scala/com/salesforce/hw/titanic/OpTitanicMini.scala b/helloworld/src/main/scala/com/salesforce/hw/titanic/OpTitanicMini.scala
index 8b21c9d5a7..7c6dabf7e3 100644
--- a/helloworld/src/main/scala/com/salesforce/hw/titanic/OpTitanicMini.scala
+++ b/helloworld/src/main/scala/com/salesforce/hw/titanic/OpTitanicMini.scala
@@ -38,7 +38,6 @@ import com.salesforce.op.stages.impl.classification.BinaryClassificationModelsTo
 import com.salesforce.op.stages.impl.classification._
 import org.apache.spark.SparkConf
 import org.apache.spark.sql.SparkSession
-import org.apache.log4j.{Level, LogManager}
 
 /**
  * A minimal Titanic Survival example with TransmogrifAI
@@ -62,7 +61,6 @@ object OpTitanicMini {
   )
 
   def main(args: Array[String]): Unit = {
-    LogManager.getLogger("com.salesforce.op").setLevel(Level.ERROR)
     implicit val spark = SparkSession.builder.config(new SparkConf()).getOrCreate()
     import spark.implicits._
 
@@ -81,6 +79,7 @@ object OpTitanicMini {
     val prediction = BinaryClassificationModelSelector
       .withCrossValidation(modelTypesToUse = Seq(OpLogisticRegression, OpRandomForestClassifier))
       .setInput(survived, checkedFeatures).getOutput()
+
     val model = new OpWorkflow().setInputDataset(passengersData).setResultFeatures(prediction).train()
 
     println("Model summary:\n" + model.summaryPretty())