I bought this case at the same time as buying an IXUS 870 IS. The case is very well made, it has a soft scratch-resistant inner lining for protection, the cut-out on the side wall for the wrist strap is very well done and a magnetic closing clasp ensures the camera is safely secured when closed. There is no doubt, this a quality case - it really compliments the camera, which fits very nicely.
However, I'm only awarding it 3 out of 5 stars due to a couple of issues.
1. The case can only be purchased through one of amazon's third party sellers. Whilst I have no real issue with the seller (item was dispatched promptly and sent via recorded post), currently all Canon DCC cases are sold directly by amazon, why not this one? This is the third Canon camera+case I've purchased here, with the two previous cases sold directly by amazon.
2. This case is brown, which is designed to go with the gold 870 IS. I purchased the case with the impression it was black. Maybe it's an oversight on my behalf for not studying the picture properly, but at first it appeared black, and still does. This important detail should be stated in the description or title. Ideally I would have preferred the black case and probably would have returned it for a refund had it been offered directly by amazon, but I don't really want to spend time contacting the seller, or more money on postage.
If you do buy an 870 IS, I would highly recommend this case - just make sure you get the right colour!