I received the dock yesterday but didn't have a chance to play with it until today. Overall, I really like it. As indicated, there's no way to use it with a case on your phone. I have the extended battery and it's a very tight fit with the extended battery backing on. The battery charger seems to work well also with my spare battery. Also, as someone else mentioned, it's virtually impossible to remove the phone from the dock with just one hand. I'll try it with the standard battery cover, but I suspect it'll be the same.
I actually ended up buying one branded by "Cellet" on eBay as well so now I have two . They're identical as far as I can tell, just with a different name on the front.
Like many, I've been looking for a dock for a while. Ran across this one on Amazon:
It has a spare battery charger for the CDMA version which is great. Only one review, but it's a good one. I Google'd a the brand and found good reviews on other docks so figured I'd give this a try. If anyone else has tried, please share your experiences here. I'll put a review in too once I get it. I just ordered it today.