It's one of the best fundraising websites in my opinion (I've used several). However, I've only used IndieGogo once and I didn't exactly raise a great deal of money - this was more to do with the product I was selling and (lack of) networking skills, etc.
With any fundraising website you really need to be able to get people on-board yourself, although if you've got a good idea IndieGogo do promote in newsletters, etc. Financially, it's the easiest site to use - if you choose a flexible plan (you don't have to reach your target) they just pay the money straight into your Paypal account. If you do a full funding plan (must reach target) they also do the same but not until the target has been reached.