I purchased these a few weeks ago and have been less than pleased.  I'm a fitness swimmer, and am in the pool for about 4 hours a week.  The strap developed a small tear within a week of purchase, and though it's still useful I don't think it's worth replacing the strap.  They fog easily, and have leaked a couple of times.  The split strap design looks cool but doesn't do a thing for fine-tuning fit.  In the water the goggles are a touch heavy, but have a nice low-drag profile.  I will be switching back to Speedo once these goggles die.