Great product, very well made, expect it to last many years. Instructions provided are very detailed, maybe too complicated, but if you allow plenty of time, it fits together very well. Took me 3 hours, and there's a couple of potential "problems". Best to familiarise yourself with all the parts first.Attach stickers first. Best tp work on a table top. Only 2-3 tools needed, nothing unusual. There are 2 light grey plastic cylinders that are throwaway items.....but they don't make this clear ! So don't worry that you've not included them in the build.Particular care should be taken in fitting the wheels. The tyre treads on the front, should mirror those on the back wheels, which are already fitted. Easy to get this wrong.The end result is well worth the effort. I can't wait to see my 2 yr-old grandson's face (birthday present). The first word he spoke was "digger", and he loves them.