I built this US Bank Stadium with my son Rudy after he got this for Christmas. It took a few weeks working on it off and on. Probably 15 hours of time to complete. The instructions were mostly helpful but some steps were challenging to see the new pieces above the pieces already completed and were very small. I needed to use a magnifying glass sometimes and also using a bright LED light helped tremendously to see the pieces required and how they were laid out next to each other, especially the tiny 1x1 and 2x1 pieces. The little 90 degree angle pieces were not easy to see how they were orientated but the bright light helped. The first half of instructions had several pieces each so it took longer at the beginning but the later part of instructions it got easier as I went. It was a fun challenge and I would recommend anyone who likes building these small stadiums to do this one here.