I just got back from my first session with the ToneDexter - Overall, the sound was good and as others have said, the wave map that works best in the live setting may not be the same one that sounds best at home.
I can get a reliable sound with the ischell and yamahiko through the felix but it takes some careful EQ sculpting to get them to work well. The ToneDexter, on the other hand, was super easy to set up - pianist is playing, flip through wave maps to find the one that works best. Drummer joins in, flip through again and find a different wave map works best now. The nice thing with this setup is I can cut down on the cords used and remove a pickup to cut down on clutter and weight (on the tailpiece)
Yet it had one big shortcoming -- the ToneDexter doesn't put out a hot enough signal to drive a powered cabinet. With the Felix, I usually have to put it at 1/4 volume to get where I need to be with my powered MAS1-8. With the ToneDexter, I had to max it out - output set to max and then about 4dB of boost on top of that to get to my usual volume. This means I will have to carry a preamp along to boost the signal between the TD and the powered cabinet.