When this was discussed last week people were deeply unimpressed.<p><a href="http://news.ycombinator.com/item?id=2940505" rel="nofollow">http://news.ycombinator.com/item?id=2940505</a><p>Tests done by HNers suggested that the service introduced significant artifacts. One comment was:<p><pre><code> Custom quantization tables and chroma
subsampling, with a bit of hype.
</code></pre>
( <a href="http://news.ycombinator.com/item?id=2940759" rel="nofollow">http://news.ycombinator.com/item?id=2940759</a> )<p>Others thought it did a really good job, but you have to scroll down that discussion to the bottom to find people who agree with the site's claims.<p>I'm sceptical.