LOL.. I don't trust the USB fan =\ What can a puny fan like that do.
Mine worked without aircon, USB fan / anything. 1 year already still no prob. 3-5 hours per session and about 2 sessions per day usually.

Anyway, they said the slim version lower quality of their lens. It seems the lens very easy to spoil. And also the slim ver have legendary heat problems la. Only pro for the slim version is that it's more portable ^^

If you want to use ur PS2 for a long run take the FAT version cos can use 3.5" HD with it.. Hehehe~ Even though your PS2 lens spoil you have other means to run your game.