I got this case on eBay, not knowing that the seller was chinesecatt.
I love the lambskin holster, it's everything that I expect from an OEM product. The case fits like a glove, literally, complete with two inside grooves to give room for the trackball whichever side you slide your 8100 in. The fit is snug, but that's exactly how I like it, because I'm a bit paranoid about my stuff and really prefer a tight/secure fit over loose/convenient one. Besides, if my old 7105t OEM case is any indication, the elastic band will loosen up in about a week of daily use.The 7-position swivel belt clip is solid with a satisfying 'click'.
Two things that I don't like about the case: First, the lambskin material is so delicate I got scuffs on mine already, and I got it only two days ago. Second, the workmanship is a bit below previous RIM OEM cases, although it is still within acceptable limits. Both complaints are minor (and I am anal retentive), so they detract little from the overall merit.
Bottom line: you can't get a better belt holster than this thing, and chinesecatt's price is the lowest out there. I know because I spent a couple of hours hunting for the cheapest OEM case.