I finished the install of my Lakeview seats a few weeks ago. I couldn't be happier with how they turned out. The kit from Denny included everything need for install including rivets and hardware. My local mechanic was willing to work with my on owner assist for the install. I spent an afternoon laying out the side rails and floor rail locations.
The stainless side tubing needed to be trimmed to length.

My rear seat belts were attached to the bench seat. I was able to use the belts but I had to order the Cessna seatbelt attachment parts. The center belts attach to the hard point where the rear support of the bench seat was. A simple bolt on installation. The side points consist of two plates that need to be riveted between the bulkhead and the aircraft skin. The parts are standard 185 parts and sold by Lakeview.
In the end it cost me 5 hours of shop time to compleat. I figure that was reasonable.

Someone asked about leg room with the seats in the forward position. Due to the thin backs of the seats compared to the bench, the seating position is a few inches farther aft. There is plenty of leg room with the front seats in a normal flying position. In this photo the seats are in the position I use for my seat when flying.
The seats can be completely removed with 2 bolts. All that remains are the floor rails and nut plates that are riveted inside the bulkheads. If I were to up grade to a 180 I could easily take the seats with me and reinstall the bench seat.
Total weight is 11lbs for both seats, that does not include the weight of the seat belts. That saves 15 lbs over my 26lb bench seat.
I plan to run the seats uncovered for a while, eventually I think I will make some light weight removable covers.