Howdy,
I suspect that most of the Ubertis (and other replicas) are good guns. Considering that there are thousands and thousands sold every year, with most being used regularly, if they were all as poorly fitted as the few horrible examples found now and then, all the gunsmiths I know would be driving Caddies and Humvees, which they are not.
Still, a well timed gun is a thing of beauty and a thrill to shoot. I'll post my rambling recollections about who made what for whom, another time.
Adios,