I just got done installing the drivers side replacement upholstery. This is a fairly long process if you've never done it before(I'd budget 4-5 hours). The quality of the upholstery was nice for the $150 price tag. There are a couple places where this kit falls a bit short. The bottom of the seat doesn't attach in nearly as many places as the stock leather. The rear bottom of the back seemed a bit short so I use zip ties. You really will never see that. It's almost impossible to get it perfect. The end result is that the seat looks much better, the leather surface was totally destroyed.
IF you want a high quality finish job, I'd suggest stepping up and getting a leather kit professionally installed. Or if your seats are intact but ugly then look at a slip over cover like the Iggee.
It's a quality product at an entry level price but it isn't gonna look like the factory finish.