I don't have a lot of experience with swim goggles as I have only recently taken up swimming on a regular basis. I can say that these goggles are comfortable, don't leak and don't fog up. I think they are a bargain for the money.

I feel very light w/ this goggles when I do intensive swimming. No water leaking, and clear view for whole hours.

They are more comfortable than most goggles I've tried and they don't leak.

Very pliable softer material makes for a very good seal and the most comfortable I have ever worn.
However, the lens plastic is very easily scratched (even from a cotton towel.) Treat them gently and they are great.

I swim laps several days a week, and have had a difficult time finding googles that fit or don't leak.  I knew from the moment I put these on that there were perfect for me.  No leaking, no fogging, and fit comfortably.

I've always had speedos before that worked fine. My last pair had a lot of scratches and the strap was a little heavy. So I replaced them with these and they are amazing goggles. The strap is very light, which is nice if you swim over 3 miles a week. The view is very clear and stays dry. Definitely the best pair around.