I finished assembly this week, the first time I have done so using some mechanical inclination, experience, and average, common tools. The most important realization is that everything must be done accurately, no, perfectly. Do many inspections of conditions as assembly proceeds, do not hurry. It cannot be over-emphasized that whatever type of foundation you create, be sure that it is perfectly level and will stay that way throughout. Once all panels are inserted in the frame, check that all are level on top and even with each other. The tops of panels must be even with the corner frames. This will judge the levelness of your base. Also, make sure the walls and frame are plumb, that is, straight up and down, measured with your level. Check this again after completing each step, or group of steps. In my case, I found that the right door frame was not square with the top, rounded frame piece. It was about 1/4 inch off while the other side was perfect. My inexperience and artificial urgency caused me to ignore this observation and I rationalized that continuing construction would itself correct the misalignment, eventually. I rechecked the base leveling, too late at this point, and found it off in several places. I then made the base edges as level as I could using x number of weather proof, resin made shims. This did not fix the door frame problem as far too many bolts and screws were already holding the frame and walls sturdily in place as they were. So, rather than dissembling and starting over, which, in my judgement would not be smart, I simply used a rubber mallet with another tool to push (force) the top of the right side door frame leftward until the 2 bolts would both insert through the hinge and the holes pre-drilled in the top and side frame pieces. However, on the inside, the frame pieces were still misaligned so I could not install the small, metal holding piece, between them as intended, to keep the frame pieces aligned. (my intent is to keep an eye on that corner going forward!) Finally, the doors were somewhat of a problem to assemble and install. I am sure that the problems were somewhat due to the frame problem above, but in any case there will be some minor engineering tasks and tinkering around to make the doors fit, open/close, secure and lock properly as intended. Unfortunately, this is the last assembly step and if anything else done before is off as much as 1/8 inch, the rest will not go well. So read this again until you get it! On the upside, I am very happy with the resulting shed. It is extremely well designed, structurally, and also has a very attractive appearance. Be aware that the majority of fasteners are screw type and most of them will not seat (tighten), even at the lowest drill torque setting, because the material is too soft to grab tight, so the screws just keep turning and do not seat well. This is true with most, but not all, of screws but most of those are only to hold pieces on before better securing with bolts and nuts so I didn't worry about it. Some pictures of the finished unit are included here. It would be wise to follow the advice in another review to not tighten the roof frame bolts, or install the top corner brackets, until the end which would make some final adjustments easier, if needed. My advice to the brave-hearts among you: Go for it, and best of luck! Do it right and you will not be disappointed.