Product review (4 stars): Worked for me on Frigidaire dishwasher
Worked for me on Frigidaire dishwasher. It wasn't easy clamping though, since the counter top was already installed. There wasn't enough gap to do clamping.

Update 10/02/2013: Granite grabber didn't last much. After two months or so, it came out from granite. Removed the rubbery stuff from it and used Loctite construction glue for stones and clamped it for a day. Brackets holding so far.