I picked these up for a bargain price before heading to Andorra in April 2011. They were very good in the bright and sunny end-of-season conditions, the quality is decent enough and they were comfortable to wear both with and without a helmet. The anti-fog is superb and I never had any problems with vision.
Unfortunately, part way through my second snowboarding holiday in December 2011 one of the plastic brackets which holds the head strap to the side of the mask sheared and broke, rendering the goggles un-useable. However, for the price (I paid £20 inc. delivery) I have no complaints! These are cheap and cheerful and very good for budget holidaymakers.
One last point to make, which is that the smoke-tinted finish is great in clear and bright conditions but if you are skiing or snowboarding in low-light or bad weather conditions you would be better off with orange/yellow lenses.