Overall I am happy with the shelves, they feel well made and sturdy. I purchased Newage cabinets 3 years ago and was so happy with them I had no concerns pulling the trigger on the shelves.
Some issues though.
I purchased an 8ft and 4ft shelf. The 8ft kit was missing the fender washers for the cables, one of the large lag bolt washers and a cap nut. I had a lot of extra small bolts and washers though. The 4 ft shelf had no small washers at all. Luckily between the two kits and the fact I kept the extra hardware from the cabinets, I managed to get it mounted correctly.
QC on the hardware needs some attention, I imagine this could be a big issue for folks that don't hoard hardware.
The other issue is the 4 and 8 ft shelves have different fronts. Doesn't really bother me, but seems like an odd decision.