Well the temps are not great out of the box, but I realised after I had spent £40 on fans, the rear fan grill was stopping a hell of a lot of heat from escaping out of the case. After I changed the grill for the normal circular wired grill, my temps shot down by 10c+
My gpu temps are now in the high 60s low 70s while gaming and in the mid 80s running furmark, but I have changed all the case fans. From changing the fans, yeah its lowered the temps, but it has made a fair bit of air nose from the front panel, but I have sorted that out with a heavy soft car cleaning cloth down the front panel and it hasn't seem to of effected the temps at all
Im guessing If I had kept the stock fans and just changed the rear fan grill, the temps would probably be more of less as they are now, maybe a few c warmer.. but my temps now are only 2c warmer then my factual define r3 case with the fan grill change and the new fans. So I am really happy with the temps now as I never thought the temps would be roughly the same as my old case. Also the case is real quiet with the car cloth idea, hehe
But yeah,, the glass panel is a tad pointless, but at least its all glass so getting another one cut with 4 screw holes in it, will be quite easy Id thought and all of the W2 cases comes with glass side panels now.