Excerpt: The Power Shot A590 is an extremely useful camera for beginning users and is moderately priced for a starter camera. I don't have much anything nice to say about it outside of this. The reason is, because it drains batteries like nother camera that I have seen before. I can only get off about 40 to 50 shots off before the camera shuts down and leaves cameraless.
Cons: Image quality was low, serious lag time between pictures, battery life under 100 pictures! I've tried to make this camera work for me for the past year, and I have never really liked it. It wasn't worth the money spent.
Pros: Small size, good picture quality, good color and clarity in daylight, uses AA batteries, SDHC memory card, a conventional cord and USB 2.0 interface, viewfinder, manual controls, AF assist lamp. Remembers the choices after the camera was turned off.
Cons: The flash does not cover the entire field. The center was overexposed while the edges were dark. Flash also takes too long to recharge. The pictures had too much contrast and the shadows were too dark, not balanced overall.
Summary: I bought this model because I have had great results with my wife's A560. Now I know why it is so hard to find the A560 - it is fantastic. The A590 looks, and feels cheap, like a badly made Chinese knockoff. It is practically impossible to get batteries and flash card in and out, the slide cover is so poorly made. The first thing you will notice when you turn it off is how awkward the software is. The display will randomly turn on and off, regardless of the settings.
Pros: Comfortable Controls
Cons: Feels Cheap, Long Lag Time, Short Battery Life, Top of Picture Dark, Weak Construction