Ive had mine for a few weeks now, and here are my impressions:
Cheap build quality for the price I paid. Just shy of $2k CDN all in for the FH, and FBV3 pedal. When I got it home, first thing I noticed was the tolex wasn't glued at all to the edge of the rear panel. Just flappin in the breeze. The knobs are sticking up proud of the cabinet. Especially concerning is the main volume knob. It's flimsy, and wobbly on the stalk, and I'm certain it wouldn't take much to shear off. Wonder how much that would cost to replace? In contrast, my Flextone III has very solid main data knob. It sits recessed into the panel, and is lower than the cabinet. Very sturdy design.
The main problem I see with this layout is some well meaning friend at a gig won't take care to notice these knobs sticking up, and slide a speaker cabinet over top of them, just trying to help out. These things get stacked all the time when gigging. This is a major over site for something advertised as "road ready".
The grille is flimsy, thin cut out plywood. Mine is cupped, so it sticks out in the middle, and is tight on top, and bottom. This leaves the gripping solely to the small velcro patches that make contact, leaving the middle to vibrate, and flutter.
I will have to finish this cabinet to my tastes, and standards, as I feel Line 6 has dropped the ball on this egregiously. This will include purchasing, and installing metal protective corners, gluing down the flapping tolex on the back access panel, getting a stainless mesh cut to fit over the flimsy speaker cloth to really protect all the speakers, and some screws to hold it down, to allow easier removal when required. Currently, access is by knife, as they neglected to include a simple fabric pull tab to facilitate removal. For the price I paid, it would have been nice to see this arrangement in place. My consultation services are free, if you want someone to guide you on how to really make this product stand out visually, and leave the purchaser with a sense they bought some quality.
The black paint wasn't very well done either on the front baffle. Looked like barely enough paint to cover the wood. All these things are surely the result of bean counters messing with the original idea, and the people who made it, where they made it. sadly, I'm getting used to being disappointed with my major purchases lately. What are you going to do? It's everywhere. My JVM 410 H didn't suffer a lick from this phenomenon however. It's still made in England. Doesn't suffer from build quality issues like the 5150 does, being made in Mexico.
I don't want to leave you all with a completely negative impression though. It's truly a technological marvel, and super versatile. The clean, and acoustical sounds are stunning, like nothing I can achieve with my Marshall. I like it enough that it's staying. Once I remedy the cabinet, I'm sure I will love it completely, despite the quirks I hope to be addressed by future firmware updates.
One more thing; the damn cat 5 cable supplied is junk. The protective ends keep sliding back, coming loose, and make it difficult to disengage. Compounding this is you installed the jacks upside down! The thumb is the strongest digit to compress the locking clip to get it out. You put that side down, and it's too close to the cheese grater of a heat sink to get my thumb in there, so I have to use my fingers. I NEVER get it out first try. My Flextone III has it right side up.
Easy fix, order oppositely mounted jack parts.
I hope you find this critique fair, balanced, and honest.