Personally I feel any external with a bit of the source "stuck in", whether AI or otherwise isn't great chopping. I've never knowly used any AI I'm more than happy to list my sources, I just often don't get the to do so.
As Bob said, not all us can afford PS, I use photofiltre 7 which is pretty basic by comparison, but I'm usually happy with my results, it just takes a lot longer to do what PS can do relatively quickly. I've tried other freeware and it's just too steep a learning curve for me to persist with (As I suspect PS would be if I ever tried it)
I'm also a little confused by what the poll answers actually mean