"I bought this set for my son for his 12th birthday. We have put together at least 100 Lego sets between my two boys at this point in our lives. We watched videos of this being put together and I read reviews. We decided to not use the kragle and just make sure that all the pieces were put together as snuggly as possible. The building of the set was smooth up until the end. When we went to attach the trees it kept falling apart. We would stop, put everything back together and try again. After doing this 3 times with the same result we decided to give it a day and try again. In the meantime I tried to reach out to the Lego company but the website just kept looping me around and we gave up and went back to the videos again. We tried to attach the two houses together first then the trees. It fell apart again. At this point we just went for it and watched half of the house fall apart as we got the trees attached. Now we are working on piecing the houses back together and it is very frustrating. Overall it is a great concept and amazing set but the execution of piecing it together at the end needs to be reassessed. The instructions just glance over it while there should be a few pages dedicated to this step. Some of the instructions for the upside-down portion were so dark it was hard to tell the difference in pieces so we had to use a flashlight to make sure we were doing it correctly. We love Legos and will of course be buying more sets but I've never been more frustrated when trying to finish a set before. I would highly recommend using the kragle on this set as you go, especially the roof! I have attached some photos of all the pieces that fell off after we attached the trees."