My Pebble XPF arrived this morning and I couldn't resist a quick test. Made sure everything worked using pads on my hand and then quickly attached a pair of cock loops. Compared to the cheap TENS unit I have (but will dispose of soon!) it is a world of difference. The Pebble is so smooth - no initial spiky sensations, a quick trip through the programs and I was leaking like never before. Then tried the Flange - oh my word! The sensations are amazing. I will experiment with the bi-cable this evening and then go for a longer session and see where things go. I can't help feeling I should have bought one of these a long time ago.