Brilliant kit, and everything fits together pretty well, you do need to do some fine tuning and have some equipment ready like clamps to clamp down the fingerboard and neck to the body, I'd recommend tite-bond resin glue (red label) to fit them together. It's worth the price as it just works.
There were a few minor issues, the fingerboard is slightly less wide than the neck, meaning you have to sand down the neck to make a nice fit. The dowels were relatively loose, but I guess this is to allow for tolerances, and once glued and clamped correctly it's fine.
My kids enjoyed decorating the ukeleles, over-all a good kit, turned out really well once finished with lacquer.
The sound though is rather weak, I think the strings with the kit are very low tension meaning they're quieter than you'd expect.