I bought a pair of green flex 7 ize's at the start of this year. I have no experience of other goggles (apart from on site rubbish) but these have served me perfectly. There is never any fogging, if any, its a tiny bit at the bottom of the lense, but i've only had that occur once. The lenses are a pain to change, but seeing as you only need to do that once a year, what is the problem? Good buy for about £50. They're also nice and roomy around your lower face due to the flex which makes the mask feel nice and open and give you plenty of space to breathe.