Here's the most recent picture of mine, taken June 30.
Problems? Well, the #$%^! rim strips which convert the wheels to tubeless, and SHOULD have been available before the bike was even produced, still are not available and Fisher doesn't have a realistic ETA for them either.
My front brake caliper was one of the defective ones that was replaced under shimano's recall.
My seat post collar broke...fortunately I was literally 10 feet from my car. Replaced with a more substantial looking (non bontrager) design.
The Bonty skewers would periodically loosen up for no apparent reason, even after I would really tighten them down. I replaced them with some Shimano Deore level skewers from one of my other bikes, much improved. The wheels seem stiffer too, if that makes any sense. Plus I don't feel like I have to overcrank them down to make it through a ride.
The stock seat and grips weren't particularly comfortable so I put on Oury lock ons and WTB pure v saddle.
I'm running a Rampage up front and experimenting with a Crossmark in the back right now. When I end up going tubless, if I haven't wore the tires out by then, I'll probably put the stock ACX on in the back, while keeping the Rampage up front.
Those are all fairly small niggles (except the unavailability of the rim strips) and over all I really like the bike. If you do long rides you might want to look at picking up a spare seatpost collar, they're small and fairly inexpensive. If that would have broke 15 miles away in the mountains it would have been a miserable experience for sure.
I've had mine since November and really put a lot of miles on it.
As for adjusting slipping in the granny gear, you might look at the tension adjustments near the shifter for the rear d. Chances are the cable has stretched a little and just needs the slack taken out.
My bike, which is a large, was 27.5 pounds stock-no pedals. With pedals and slime in the tubes, plus a heavier tire up front (but no reflectors, etc.) I'm guessing it weighs around 29 now, but I haven't bothered to find out.