These babies make my dark brown eyes as blue as can be. They don't look fake or unnatural (to me at least) and they're very comfortable. Can't tell the difference between these and my regular contacts comfort-wise. On that note, I got these in my prescription and that's perfect as well. 

I agree with a previous reviewer that they don't really offer much enlargement. The lens itself is 14.5mm in diameter but the actual colored part is smaller, probably more like 14.3mm.

Overall very very happy with these. Will definitely buy again when the pair I have wears out.