Finished Building this yesterday. I did it 100% by myself (no helper or assistance) and took about 30 hours plus I spent 3 sorting, labeling for ease later. Made all the difference in the world. I had a bunch of bins that I labeled and organized with each nut, bolt, screw, etc and this was the biggest time saver.
Couple things to note if you are considering purchasing this set. I am in construction and had access to a few extra tools that would have made this job close to impossible without.
1. I had to retap a lot of the nut barrels as the threads on a lot of hardware are stripped and ruined out of the box.
2. You will want a saw of some sort as some pieces are too long to fit in the designated areas.
3. A lot of the pre-drilled holes are not where they are marked according to the drawings. Be prepared to drill pilot holes for yourself.
4. I have plenty of experience with prints, and these are somewhat lacking. Some page. Some pages are in spanish, some pages there are addendums so make sure you know where those are when you get to those page.
5. KEEP THE PACKING SLIP FOR EACH BOX. I had a clipboard with all 4 box packing slips. Kept it by the wood in the garage and I kept all 4 boxes separated. Makes finding what you need a breeze.
6.I definitely recommend buying some sort of bin or shelving to properly label each bolt. Take the time and do this. There are probably 50-70 different screws, nuts, washers, etc. Just take the time and do it. Label them so they are easy to find what you need. I would have been pulling my hair out because even with this. There was 1 extra of each size bolt, so keep it organized until the end or you will be scrambling trying to find that 5/16"x2" carriage bolt that disappeared.
Wood feels a little on the cheap side, but time will tell. All in all, my kids are loving it. It looks great, most of the install was pretty easy. Motion Sensor lights for night is a nice touch. Just be prepared to improvise as you go because there will be issues with pieces fitting where are supposed to go, the pilot holes being improperly drilled, and other issues. Hopefully this gives my kids enjoyment for years to come.