I've got Uberti rifles and several pistols. The rifles were fine out of the box, if you like a heavy hammer fall (I do), but all of the revolvers needed some work to run well. Timing issues and roughness of parts being the main problems.
I just acquired a trio of Open Tops in .38 Spl. - one Cimarron R-M conversion and two Uberti '71s. One of the '71s has had to undergo work to the hand, cylinder ratchet, the hand channel in the frame, bolt and the trigger/hammer interface.
The external finish on Uberti guns is generally quite good as is the wood to metal fit but they don't get individual hand fitting of the moving parts. It's a hit or miss proposition.