Finally, after waiting 6 months it arrived. First impression is that it was definitely worth the wait. This little amp kicks ass and handles the low b effortlessly. The major differences, from my mb115, are that the amp section has a vent and a small cooling fan to circulate air and no tweeter. The eq has a lot of range and it's voicing is very effective with the 12" speaker. So far, I've only played my fender am std P 5 string and my mtd crb 5 through it, and both sound great. I'll be trying it with my Laklands and my upright later. I expect to be impressed with those too. I think that this is going to be a great amp for small gigs, pit work and rehearsals and it only weighs 28 lbs.