To be honest with you, all goggles that are NOT racing goggles should be banned except for diving masks for DIVING ONLY!  I've used Speedo Vanquisher for 10 years and I don't want any other brand.  They are fantastic!  Two things, make sure you put the correct size nose bridge in when you first buy them, and don't lose the extras; two: when you put them on, you should raise your eyebrows like your shocked, and then press the cups against your eyes to get a suction seal.  They should be able to stay on without a strap on deck before you dive in...that's the test for a real seal.  You can even test that in the store.  Another helpful doodad is a bungie strap...costs about $5USD and allows for QUICK adjustment.