Summary: Bought this to replace an A450 for a friend. Slightly higher megapixel (7.1) and takes pretty good video. No image stablization tho' which is probably the handiest thing invented for cameras in the last century. Size is good for sticking in a pocket, about 1/2 inch narrower and 1/2 inch higher than the A450 but about the same depth (ie: more square) but still pretty small. Don't know what is maximum size for the memory card.
Summary: I'd rate this camera Excellent for the price -- But I give it a good overall. I bought this cameera for my daughter who is in High School and she loves it. The quality of the picture is outstanding and the camera is very easy to use. I bought a used one in excellent condition for $35 on Ebay (but they usually go for $65 or so depending on condition).
Summary: We wanted a camera that uses AA batteries (for convenience) and is easy to hold (for my young children when they take picture of us) so we bought this camera. I had a Canon Powershot A80 and liked the picture quality but it broke after three years of use. The A80 was quite expensive at that time so I hesitate to get another point-and-shot that priced at the higher-end. We are very satisfied with the price, the picture quality, and the functions of the A550.
Summary: We all know you can't see the view screen outdoors because of the glare. No problem - just use the view finder, right? Wrong. Its so far off, when I "center" my shots, the photo comes out with my subject OUTSIDE of where I framed my shot. That's right. I put the person's face in the center of the viewfinder and the photo downloads their torso.
Summary: Canon's PowerShot A550 is a simple, inexpensive 7-megapixel camera, and that's all it wants to be. While it has some nice features, it doesn't offer any outstanding, unique aspects that put it above any other camera in the field, and that's just fine. Good performance and solid images are all a camera needs to succeed, and the A550 delivers just that. Though not quite small enough to slip into your jeans, the A550 is still comfortably compact.
Summary: I love this camera! The pictures are clear, it's very portable and easy to use. Great quality. We also like the video function. It's great on batteries. We have rechargeables and I don't find myself changing them that often. The only negative comment I would have is that it takes a few seconds for the flash to recharge so if you're trying to take a lot of pictures indoors you have to be a little patient. But still, I'm very glad I bought this camera.