Summary: I bought this camera and was very pleased with many of its features. The other reviews do a good job discussing its strengths and weaknesses, so I'm only going to contribute something that many readers may not find it easy to gain information about: repair problems. The Canon Powershot SD400 I bought broke the first time I used it. There was a problem after uploading the pictures to my PC, and the screen froze. That's when the troubles began.
Summary: As a digital photography enthusiast and a fan of Canon cameras, I had high hopes for the SD-400, hoping it might be a smaller and lighter weight replacement for my Canon S-50, one of three Canons I own. What I discovered was that the SD-400 (that I ordered from Amazon) is incapable of capturing sharply focused photo. Every photo -- wide angles from distance, medium-range, head and shoulders, close-up, macro -- everything was every-so-slightly out of focus.
Excerpt: This has been a great camera i have had mine now about 8 months i love it . I have dropped it several times and it still works fine. My only gripe is that the shutter speed is a bit slow. Overall a great camera.
Summary: Picture quality was good however after 13 months (just outside the waranty) the lens would not retract. This it seems is a common fault and not worth repairing. Canon also refusing to repair faults like this within waranty and argue dust has caused it. There is a group in the US planning to take legal action against Canon on ther grounds of poor quality. I suggest you buy a different camera .
Excerpt: SIEMPRE defendi esta camara hasta que hoy comprobe que se averia sola y buscando en foros resulta que les pasa a otra gente lo mismo. Resulta que el enfoque que le sale automaticamente hace un ruido y sale por la mitad sin posibilidad de hacer nada se trava este lente y pone error 18.(sin llevarla nunca a la playa y cuidandola) la cuestion es que para subsanar esto canon te cobra mas que comrar otra camara nueva.