Good function Great value for money

Can not keep up with the "professional" devices, it does not need for the money. a bit fiddly is the use of wheels with quick release axle, works with the aid of cable ties but also good.
Important: The setting of the stops DOES not have threads, but clamping. This is the beginning, very inconvenient if you have to get out, "the trick" But it is quite good.

The bottom line:
Good and cheap tool for home, is well suited for re-centering and wheel building if it does not arrive to the last tenth of accuracy.