Adding more language to prefer 2.2.0 over 1.2.1

index.html

@@ -45,7 +45,7 @@ <h3>Picturefill Version 2.2.0 (latest stable version)</h3>
 			<li><a href="https://github.com/scottjehl/picturefill/blob/2.2.0/dist/picturefill.min.js">picturefill.min.js</a> (production version, minified code)</li>
 		</ul>
 		<h3>Version 1.2.1</h3>
-		<p>Version 1.2.1 of Picturefill is available if you are interested in the older markup pattern that uses <code>span</code> elements. This version is a lot lighter in weight than version 2 and allows for a fallback image in browsers that have JavaScript disabled (whereas Picturefill version 2 only offers <code>alt</code> text as a fallback for  non-JS browsers without <code>picture</code> support).</p>
+		<p>Version 1.2.1 of Picturefill is available if you are interested in the older markup pattern that uses <code>span</code> elements. This version is a lot lighter in weight than version 2 and allows for a fallback image in browsers that have JavaScript disabled (whereas Picturefill version 2 only offers <code>alt</code> text as a fallback for  non-JS browsers without <code>picture</code> support). Unless you need either of those features, we recommend you use Picturefill version 2.</p>
 		<ul>
 			<li><a href="https://github.com/scottjehl/picturefill/blob/1.2.1/picturefill.js">Picturefill version 1.2.1</a></li>
 			<li><a href="https://github.com/scottjehl/picturefill/blob/1.2.1/README.md">Version 1.2.1 readme</a></li>