For the price, this is the very best out there.
I have a 58cm head, sitting right between M and L sizes. I got the M. It fits almost perfect - just puts a bit of pressure on the cheeks and the forehead (I get a red mark on my head after an hour-long ride). I have a round shape head - this one is a bit more for oval shaped heads. (meaning - a head taller than wider). Still, the fit is very good, and pretty confy even for an hour-long commute.
Visor is fantasticly clear - even being no-fog it is a great visor to have. Will only fog in rainy conditions, though.
Changing visor is easy and relativly quick, requiring no tools. Tinted / mirrored / iridium visors are readily available on ebay.
Pros:
Very VERY cheap
Very Confy, even on hour-long rides
Very optically perfect shield.
Tough
Chinstrap does not come off easy.
Great quality paintjob. Great finish. Does not look cheap at all.
Cos (for this price, some corners had to be cut):
Interior is not removable.
Visor is not anti-fog.
Pretty dumb front ventilation system.
Average Ventilation.
Lack of features, simple helmet. No aerodynamic appendages, just a helmet. that is all.
Would recomend as a helmet to whoever doesnt want to spend a lot of bucks.