I see why they are called ZOOMERS. I was zooming and not really kicking much at all. Almost felt like I should move to a medium lane (haha!). My first lap with them on, I couldn't believe how fast I was going and I was barely kicking. An excellent purchase---I really was able to focus on my arms, core, balance, body position. Body placement was definitely higher in the water. Did about 12 laps or so w/them on (waited til the lane cleared so I was splitting it w/someone instead of circle swimming). When I took them off, I could notice a difference in my overall form and it was for the better.

Have to admit that when I put some effort into the legs, the zoomers really worked them, particularly my ankles. Weirdly enough, I didn't feel like I was going faster w/more leg action, but that might have been because of the effort w/increased resistance. My initial take on them is they will improve leg strength if you kick harder. Right now, I'm going to use them to help w/my upper body technique and my body placement/balance in the water.

I'm going ahead and getting the red ones because I think my strong legs are might be too much for the blue ones. I'll alternate the blue and red ones, and I found some exercises for ankle flexibility.

As HillSlug said, swimming without them is really the goal. However, I can tell that using them for drills or to supplement my usual laps is going to improve my swimming.

There was a lady wearing them who was circle swimming w/me and two other slow pokes today, and she kept lapping us. She wore them the entire time. Without the zoomers, she'd had slowed down significantly!