Galaxy S3 Touchwiz Opinions?

I am an iOS user. This isn't intended to be a flame sparking question but rather about being curious about the advantageous to Touchwiz, and what you may like about it compared to stock Android. I have seen screenshots of it, but its hard to get a sense about how good it actually is in day to day use.

Personally, from merely looking at Screen shots I'd think the HTC Sense ui on the HTC One X seems cleaner to me but I'm sure it isn't that simple.