Has anybody tried/used the saddlemen gel pad and if so what are your thoughts and also were can you get them from?

I have not. But do know of guys that have had gel seats and on hot day. Could not ride home as the gel holds the heat and Will burn your arse. Apart from that they liked them.

I haven't tried the Saddleman Gel Seat Pad but I can recommend the Air Hawk air seat pad (cruiser version).