I really wouldn't touch them with a barge pole.
Claiming success 1st, 2nd, 3rd hour suggests they use a martingale type approach. Losses will be far larger than wins, perhaps that is why they don't show the values of their successful/unsuccessful calls.
Probably overpriced as they offer FREE ipads - which is nothing short of ludicrous.
I'm sure there are some good signal providers at reasonable cost, but I would suggest these are definitely not one of them.