Easy to install and assemble, the bottom part moves freely (dont overtighten the bolt - tho it should not allow you to overtighten it) so when the printer "eats" the filament the spool rotates no problem.

Probably good idea to print and install a tiny filament guide since it has a tendency to unwind a whole loop at once and excess filament hovers over the printhead, to close to my liking. 

I have been using it for 2weeks and no issues, print is very solid (yanked the upper part and it moved the whole cabinet which is IKEA PAX (150cm x 200cm x 60cm).
Bolt goes nicely in the thread. Might be that the bolt is a little (5mm) longer than the actual "nut" part.

Used smth like 6 perimeters for the top part which is screwed to the cabinet and for the bolt.