I had a one. If you want a Carvin Legend or Steve Vai tone, then it's exactly what you need. It has insane liquid high gain tone, very very smooth, much smoother than even an SLO, but can also sound like a ballsy 800.
I bought it strictly as a Lead module and it did the job. Though the Camerock and Custom 3 did it much better, so it went.
Cool mod, but can't say i miss it much, or that any modded XTC module would pretty much give you the same and much more!
In your case, since you're not looking for extreme high gain, then it might just be what you're looking for. The Camerock / Custom 3 are much more high gain, but I will say the Camerock / Ecstasy are better all round modules. Looking at your rig, I'd say a Marshall based preamp is what you're missing, and either of the latter will be a great addition.