I really like it. It's really simple to make, and really bulks up a dinner. The consistency whenever I make it is a lot more like cous cous but this could be due to how I have blended the cauliflower.
Either way, I think it makes an excellent substitution, as the cauliflower has a taste which I like, but which is mild enough to be unnoticable when used as part of a curry for example, for those that don't like the taste.