Purchased upper and lower cabinets for a 8' x 15' galley styled kitchen I did for a customer in a small condo apartment. Style was Shakertown. I was pleased with the overall quality of everything and everything came as advertised with soft-close hinges and drawers.
The only flaws I found were a couple screws missing from the front of drawer slides and also a couple dovetailed drawers where they dovetails weren't quite flush with the piece it was dovetailed in to. Everything was glued and strong though and it didn't bother the customer, so I left it and didn't pursue it with KCK.
I had trouble finding the touchup kit I had ordered and called about it and they were very friendly and offered to send me another one free of cost which I was pleased with.
Shipping was relatively quick and it came when they said it would. I was VERY impressed with the packaging. I have done a lot of kitchens and have never seen delivered cabinets come this well packaged. No damage at all. Came on two pallets that were both completely wrapped in really large bubble wrap from top to bottom.
When ordering I had a couple questions and was confused about which cabinets were pre-assembled and which were sent to you unassembled. I used their chat feature to ask them for help. They picked up right away and were very helpful and it was much easier than calling.
I went with the pre-assembled because I had ordered similar cabinets on the last kitchen I did that were delivered unassembled and did not find that cost-effective and worth the savings. The preassembled cabinets had similar jointery though with small metal brackets holding the plywood sides together as well as the front face. It's not the strongest thing ever but once they are installed and all screwed together, you will have no problems with strength.
Customers were super happy with the kitchen and other than the dovetails in the drawers being a little off on a couple, they had no complaints.