I -just- got one of these on Xmas eve. The battery life is great, but I'm still in the conditioning phase. Yes, I agree that it doesn't have the cut-out to get at the kickstand - what you should do is press at the opposite end (where the hinge is), this will pop out the other end (the bit it sits on), and you can pull it out. It'll seem awkward at first, but it's really no worse than what you were doing before. The back seems reasonably sturdy - but probably slightly less so-long term than the original. It's made from a similar material, and feels nice in the hand.
It -does- have the same issue with battery level display as other extended batteries (Seidio, etc). I believe that this is an issue with Motorola's software - I'd love to hear from someone on CM7 who has one whether this is a hardware issue, or a problem with MotoBlur roms (software). Either way - please join me in writing/calling Moto to ask that they fix this in their next (hopefully ICS) update.
So far it's been a fantastic gift and good value for money. I'll update here if I find a workaround for battery reporting / my battery life goes up/down-hill.
Hope that helps.