This is a well made snug fitting leather case for the PowerShot G12. It's a bit retro in that the style and look are very like what all camera cases looked like 25 years ago!
I've seen other reviews that criticise the fact that when opened there is a tendency for the large press stud on the base to become slack and allow part of the case to fall off. So far, this has not happened to me so perhaps Canon are now using a different component.
There's no storage for a spare battery/memory card with this type of case but you can get over 1500 exposures on a 4Gb card so you'd have to go some to need to have to carry a spare card with you and similarly you should get around 300+ shots from a charged battery. So in truth, carrying spares is not an issue.
Finally, the G12 is a fairly compact little camera and the leather case helps to bulk it out a bit, which is helpful if you have large hands.
All in all a good buy!