Very nice. I need resizing and cropping a lot, because I blog from my tablet and want to downsize images before posting. (Especially when posting from abroad via 3G.)
5 stars not so much because it's a great image viewer (it is good, though), but because it's still the best tool for performing this kind of simple image manipulation on the tablets. (And the way I use it, it saves me real money.)
I like this powerful app, includes many options to display images (all), with few minor interface improvements can have 5 stars.