I just used ember to build a side project (http://bests.com) and it turned me into a huge fan. It is great how little code you need in ember to tie an API with a UI in the browser.
The advantage comes in for organization and simplicity of the code. I don't have to write any jQuery like for $("#item').html(). I just set a property on the model and it updates.
Did it also send you spinning? (sorry)