The i-Blason case fits the iPhone 6 Plus perfectly, although the camera hole is slightly off vertically. This is not a big deal as there is plenty of room around the camera so the lens is not obstructed. If anything, it's remarkable how accurate the case is considering it shipped the same day the phones were available, so there's no way the company could have had them in hand when creating these cases.
One reason I chose this case had to do with the ability to have the kickstand to prop the phone on its side. This works quite well, although it's slightly awkward to snap the stand into place. There's no equivalent issue with folding it back in place, though.
The power button and volume button overlays feel like they make a better connection than Apple's own case. When I press them it feel like I'm pressing a button rather than something on top of a button.
I'm not interested in using the belt clip (that's a bit too 1999 Palm Pilot for me), but that's a separate piece so the case does not require the clip for use.
Note that shipment comes from i-Blason not Amazon and shipped via DHL. My shipment was scheduled to be delivered between a Wednesday and a Friday, but it didn't come until Tuesday of the next week. Even DHL indicated that it would arrive by the earlier Friday, so I have no idea why it was so late. I'm not sure if it was the fault of the DHL or i-Blason.
Feel free to add your questions, thoughts, comments and rebuttals in the comments.