As I stated in a previous post, this was the number one issue for me, and the reason I no longer have the phone. I was always missing/dropping calls inside my house with the Fascinate, however with the Droid 1 and now the Droid Pro, I have zero reception issues inside my house. I honestly thing Samsung spread themselves a little thin throwing a phone to every carrier. True it's basically the same phone on each (except for GSM and CDMA differences), but all of them are different, and most likely all have a seperate team working on each model, or the same team is trying to work out the bugs one model at a time. All personal opinion, no fact...
But, the phone has been out for almost 3 months now, and the GPS issue hasn't been addressed, the reception issue hasn't been addressed, and still no Froyo in the States. Those are just the biggies, there were other quirks here and there with the phone that I can't remember off the top of my head.
I loved the Fascinate's form factor, but my phone is a big part of my personal/business life. I have to have something reliable, and Droid Pro hasn't failed me in 3 weeks yet.