I own the T-962A, which is bigger than the T-962. I've "cooked" thousands of boards using this reflow oven without any problems. If you use panelized boards that are too big, sometimes you get a component in the outer edges that doesn't get soldered. But, a quick eye inspection should be enough to take care of this. The reflow curve that you use to program the oven is very important. If you choose the wrong curve you can burn the board or you can get cold solder joints.

I do recommend the T-962A, but I haven't tried the T-962 model.