Slightly delayed response, but I've now used this for 2 practices with both a Yamaha BB1100s and Gibson G3 and can say it is brilliant. I haven't had to push it beyond 3 on the master for fairly loud practices and am looking forward to gigging it properly for the first time in a couple of weeks, It is bloody loud and I really like the tone, especially as I didn't think I'd go back to 15s. As said by a lot of people here the one trip for the car, even with 2 basses is great and my back certainly notices the difference. I guess the comments about the Orange not having the best EQ are fairly true but I really like the flat sound so that works for me. The only thing I have missed is the channel switch from my old Marshall which I used to use to boost sound under solos but I have just added and EQ pedal and that seems to do the job.
All in all I'm really happy with it. Jobs a good un!