My experience is , it was something I didn’t need but I liked the look of them , and there’s something about glowing valves that’s quite magical, but my ones went back to the shop 3 times for repair , so I’d be prepared for a bit of maintenance and my LB30 needs to go back again, I might just have been unlucky, the markbass tube is a great amp, I would definitely have another, I now use the RM500 and love it , I’ll probably try the Handbox WB100 at some point though 🙂