Great pair of goggles, I had a few concerns about quality before I ordered it but when I recieved these, all concerns vanished. The lenses are THICK, in my opinion there is no worry about an airsoft bullet breaking them. Fan works great, it's winter here so not a lot of airsofting going on, so to test the fan I ran a fast half a km with them (and my "G&P SWAT Army Neoprene Half Face Protector Mask GP536") in -12C weather and I was TRYING to fog them up. By the end I got them to fog up a bit, but I just turned the fan onto it's high speed and it didn't last long.
So, from someone who has trouble wearing goggles because I fog them all up, yes I would definatelty recommend this pair.