They have a large store with many products, though often it's the cheap plastic junk and not the quality goods. And to top it off, their prices are no longer better than many alternatives. That said, they have a wide variety, and their shipping usually is reliable.
Their web services are top notch, albeit a bit pricey.
Jeff Bezos is a trouble-maker though. I don't like supporting him when I can avoid it. I have no problem with him gaining wealth, but he wants to buy up lots of media lately. That could be concerning.