Overall it's a great idea and I can always count on it to discover new songs but it has obvious shortcomings. Like replaying songs, skip limits, ads... Spotify is better for listening to music you want to listen to. Pandora is good for discovering new things.
Generally sidereel.com is pretty helpful but sometimes if you aren't careful a lot of the links to tv shows are suspect. Generally results in spyware or a virus. Before megavideo went down it was better.
I used this site to help me take a trip to New Orleans recently. They treated me well and got my tickets together quickly. They were a little pricey but I expected that I guess. Overall, I just really liked the customer service. They guy that handled my trip was just really friendly, seemed like he liked his job. It was refreshing.