Product is made of quality material and workmanship. The manual contains detailed information. Only complaint at this point in time (kids have not started to use it yet) is the manual steps, parts and hardware are not labeled and outlined in a manner that makes for effecient assembly. It takes time to reorder and organize all the work and hardware, then correlate those to each step in the manual. There is an opportunity to do some of this as part of labeling and the manual. (I understand that these kits are modular and are put together, but there still could be improvements made)