Yup, absolutely love mine! Still now, every time I tub it on I'm stunned by the display. It's very quick, it has an excellent and very usable camera for a phone, sound quality is very good through headphones, multitasking I think works brilliantly (not iPhone 4 specific I know), GPS is a lot better, it looks fantastic, even the gyro is great (real racing is fantastic with it). So overall top notch!
I can replicate the antenna issue, but in actual use it has caused me zero issues as I dont hold it in a way where I touch that area. And now I get a free case for it. Spot on!