While I combined 4 kits for a customer for his model railroad, I also have a few for my own collection so I have some experience in these kits! Take your time when assembling all the piping. The fit is poor so you will need to adjust them to make a proper fit. The directions are mis-numbered in one area in step 1. There are two Part No. 14s but one of them should be Part No. 13, I believe. Best to study the drawings to identify the parts. Even with the alignment issues, the kit is nice. If you are going to combine one or more kits, best to assemble all the pipes first, then mate everything before you all the top platforms.

Take your time, not that difficult to construct,small parts and takes a little time to keep in line to match piping kit

This is not an easy kit. The instructions are inadequate and several pieces are mis-identified in the illustrations. When attaching all the piping pay VERY CLOSE attention to the illustration as it only fits one way. Also, in my opinion several things are done in the wrong order. For instance, don't attach the stairs until the very last as they are easy to break off. finally the modeler is instructed rather cavalierly to cut the angled piping apart and glue it back together in order to make it fit. What? Anyway, once completed it does look good. There is minimal flash and the moldings are clean.