+1 in a big way.
I finally had a chance to play on the Markbass Super Synth and compare it against a Boss SYB-5 and my old Korg G-5 on the same day. I have to echo that the Korg G-5's tracking is far superior to others.
While I am glad to have a Korg G-5, I always want new toys and REALLY was gassing over one of these Markbass Super Synths. I really like that the Markbass Super Synth has true bypass and a smaller footprint than I'm used to. Also, I like some of chord sounds and the +1 octave on the unit. However, I was turned off by the tracking, the inability to get a completely "wet" signal, the lack of control on the fly, the lack of "vocal" sounds, having to scroll through presets, and the lack of an expression pedal input.
Relative to the other "Bass Synth" effects that are currently manufactured, I think the Markbass Super Synth is certainly a valid option. However, being a G-5 owner, I would never use the Markbass, simply because I cannot play fast passages with it that are achievable on the Korg.