Well I got my AT&T iPhone 6 Plus 128 GB Gold on launch.
My first impression with the iPhone 6 Plus is just amazing. Previously I have owned iphone 3G up to iPhone 4S, then I made the switch to the Samsung Galaxy S4 and S5. For me the iPhone 5 and 5S was just a disappointment, being that they only made it taller and didn't make it wider and just made it look weird in my opinion. So I decided to skip 2 generations of the iphone. After the Apple announcement, I was stoked that Apple finally is coming about with bigger iphone. I was planning on getting the Note 4 when it would come out in October but after hearing that Apple announced the 5.5 inch as well, I was immediately sold.
After holding the 6 Plus, at first it looked huge, but after a while I've grown into the size. Holding the phone is not an issue for me and I can easily one-hand it, but when I text I always use two hand anyways since I use swiftkey.
The quality of the screen is just flawless. I was worried about dust, yellow tint, washed out screen, backlight bleeding, when I inspected the phone, I had no issues, and was the perfect phone.
Battery life is awesome, I have no issues with draining.
Overall, I'm pretty impressed with the 6 Plus.