I've been using mine non-stop for about 2 hours since I got home from work and I have 0 complaint. I am thrilled at how awesome iOS4 is on this thing. It was blowing hard on my 3G.
I have made calls and have been using wifi a lot and I have no issues with reception. No yellowish tint or yellow spots. Fast app switching is freaking awesome.
Pretty much the only thing I haven't done is test the battery (haven't had it long enough, lol) and I have not used facetime. I probably won't use face time for a while since I think I'm the only one I know that is going to have this phone for at least another 2 weeks or so.
But yeah- I'm with the OP on this one. I am loving this phone. It looks good, it feels great in your hands (loving the new home button feel) and it is working even better than expected for me. 😀