Yes, I have a PJB briefcase and it's a really good bit of kit. I use mine mostly with double bass, but have also used it with a band rehearsal and it just about coped with a quiet drummer. Being able to run it off a battery for an hour is another useful feature. I'm even getting used to the farting noise it makes when you turn it off. I also had a double four for a while, but gifted it to an elderly friend who was struggling with the size and weight of his previous combo. Amazing to think that kit this compact can make such a big sound.