I took part in evaluations of the ZT Lunchbox and Club guitar amplifiers. Tests done by a member of the group indicated the advertised power was highly optimistic. Beyond that, the tone was lacking (in my opinion, of course). They were notable for being really small and light but, in comparison to my Fender Jazzmaster Ultralight, did not sound that good and the designer had made a couple of idiosyncratic choices for the effects and tone controls. You understand that some people are in love with them.
As for a bass amp, I checked out the ZT web site and I don't think they are doing anything my Genz-Benz isn't doing already, at a lighter weight and for less money (Shuttle 3.0-10T + another 10T cab ran me $1219, with a weight of 18 lb for the Shuttle 10.T and another 11 for the extension cabinet). Both my own G-B and a friend's 6.0-210T sound very good, and it's unlikely that I'd change to the new one. Just my virtual $.02.
