GE is big where we are. I find that they offer quality products of good value. I would still have to say that Square-D beats them all. We did use Cut-Ham on a regular basis but it seems that since CH and Westinghouse merged, CH products cheepened their products considerably. As for Siemens, as far as I'm concerned they offer the lowest quality product around.
We never install Seimens but I have serviced panels where lugs were loose from the factory and I know that the threads in bus bars easily strip out in bolt-in panels. I avoid Seimens products at all costs.
As to devices I would have to say that that P&S makes a very good product. It seems that the people at P&S have some knowledge of field conditions and make their products more "user friendly".