I've had my shell/holster combo for my X since last September. I like it and it has served me well till the other day. I was quickly exiting the Suburban and the phone got caught on the seat, snapping the pivot joining the holster to the clip. A quick stop at the local Verizon store revealed that there were none in stock so they ordered one for me and I received it two days later.
The new shell and holster is slightly thicker than my original. I'm assuming to accommodate the extended battery? I can't say for sure because I still use the original battery. The shell also has a pull/fold out type stand that will allow you to stand up the X in both the horizontal and vertical positions. Not sure if this subject has already been addressed or not but thought I'd pass it on!