I'm so glad I didn't buy that - I was really tempted until I realised I can buy the same hardware for $35, uncased. I might buy that.
I bought another so-called scandoubler off eBay a month ago, and it's so terrible it's going back:
http://www.ebay.com.au/itm/15Khz-RGB-RGsB-RGBS-VGA-XGA-Converter-Scaler-/350497862833?pt=LH_DefaultDomain_0&hash=item519b4cf4b1It's advertised as crystal clear conversion for a lot of systems including Amiga, but it truly is a pile of crap. Pronounced vertical lines, artifacts, and no hardware adjustment either. Expensive to post back to the US too - $30. The unit is apparently set for EGA only, according to the technical people at the company in California. Any kind of search for "Amiga VGA" on eBay will bring up their crappy product. It's blatent misrepresentation.