Ok I've had quite a bit of the source audio gear in the past, MWD Pro, BEF Pro x2, Hot Hand x2, Hothand3, Dual Expression pedal
I had a lot of fun with the hothand and recommend anyone to try one, I found it to be very responsive and unbeatable at plug-in wobbles
I found that I could only really use the hothand / hothand3 for wobbles (with the BEF PRO and a gated Fuzz). The hothand3 works with most 3rd part pedals with an expression out so other filter pedal's etc. I used the Hothand3 with the line 6 m9, and really didnt like using it as the expression. Just didnt feel right / sit right for me. Every one plays differently but I found it really a one trick pony.
I havent checked Talkbass for a while, but theres a source audio thread or two which should prove me wrong and show people using hothand3 with all sorts of pedals with great effect.