This are the best googled I had have. They are so comfortable and don't leave a really strong mark as regular googles. I am so happy with them, so far, no leaked at all

Sadly one eye gasket on these goggles leaked from the first swim I used them. My previous identical (except for color) pair lasted a long time and never leaked. 

I've always had excellent results from Speedo goggles until I purchased these. They don't seal well. After repeatedly tightening the strap, I finally got them to seal a bit better (only had to stop and empty them out about 5 times in an hour of lap swimming), but they were so tight that my whole face hurt by the end of an hour. If you're swimming backstroke, the extended skirt-like seal actually scoops up water and funnels it into the goggles whenever you push off the wall. After two tries with these, I'm going back to Speedo's older style. These just don't work well for me at all.