Recently bought a second hand GB 3.0. Pretty impressed with weight of the set up - 9kgs and sound. Sound pretty good on 5 string and double bass. Always searching for a better lightweight rig.
Agreed - I bought a 3.0-10t combo soon after they came out and still have it. Such a well thought out piece of gear. With all the innovation there's still no sub 20lb. combos that will do what this does. The 3.0 head sounds great with larger cabs too.
Yup, I've used mine at lots of small jazz gigs, playing at retirement homes, rehearsals, all sorts of places. It's pretty damn useful, definitely a keeper.
I'll play devils advocate......I owned a 3.0 and unless you run it at 4ohms....the thing sounded lifeless and compressed to me. 4ohms is where it comes to life. IME though. YMMV.