I bought the G1 as to have an all-in-one pedal after several pedalboards (both traditional assortment of pedals and a MultiFX GT-100 from Boss).
After playing with it for a while, I sold it :(
It's not that it's bad, but the sound coming from it doesn't sound like "the real deal", it's over processed a bit like with the Boss GT-100 I had before, it sounds like everything is "excessively digital", with the downside of being very clunky to program without a computer.
In the end, I'd say that if you're on a budget and want one pedal to do it all, specially for playing at home, it will suit you. But don't expect it to replace single pedals or even a large MultiFX.