I got the EVO Design about a couple of weeks ago to replace an Optimus S after doing a bit of searching on this and the other forum. What I found was that there aren't any significant issues with it.
The Opti has a huge amount of activity in forums. The EVO Design, not much. I think it's because the EVO Design has plenty of memory, doesn't have issues with the SD card, runs fast, has a good UI, good camera and is very stable. These attributes pretty much take away most of the issues for anyone to go looking for solutions in these valuable forums.
Needless to say, I am quite satisfied with the EVO Design and would highly recommend it.