Received these the other day. OK quality, (just ok) and they are MASSIVE, but luckily so is my face. The battery housing is difficult to get into and the metal bits for the battery are loose. I like the two speed, full power works quite well at getting rid of the fog, but on high speed it's quite noisy, not so tactical. :) I might need to bolster the anti fogging polishing in some soap.
Overall, a good stocking filling for Christmas.