I've been using mine since launch day. 32 months later and still going strong. Haven't had trouble with it and use it daily. I would definitely recommend.
Try Eneloop rechargeable batteries from Sanyo. Way cheaper and lasts me a good month or two on single charge. I've heard the Apple rechargeable batteries are just relabeled eneloops.
Love mine, especially how there's no mechanical scrolling ball to get gunked up, like with the previous Mighty Mouse.
When I switched from the Mighty Mouse to the Magic Mouse, it took a few days to get used to it, but now I absolutely love it. Couldn't live without the gestures.