I have my second Uberti NMA (58, they call it). Both of these were great out of the box, only thng needed was to lighten the mainspring some. I put an R&D cylinder conversion in them. They both worked great, although on one, I had to relieve a small bit of the frame so the cylinder didn't touch (R&D mentions this as a possibility, so it didn't come as a surprise). How accurate are they? Tack nailers, both of 'em. A friend of mine got two Piettas. The R&D cylinders don't seem to work on them too well and one won't retain the cylinder pin as it should; drop the loading lever, slide the pin out to remove the cylinder. One of them just keeps on going, out onto the ground. I won't vouch for accuracy, as I haven't fired them. So far, I'm glad I got my Ubertis.
I bought two Uberti model 73 rifles. Both great workmanship, just the normal lightening of the springs needed. Accurate right out of the box.
I picked up an EMF 1890 Remington, Uberti made. It was rough and needed quite a bit of work to make it function right. It isn't the gun that the others are, but maybe with a little more action work, it will be. Accuracy on this one? Right in the center of the target. No complaints, there. I can smooth stuff fairly easily, but it needs to shoot straight. I figure 4 out of 5 were top notch right out of the box.
I wouldn't hesitate to get another Uberti product in the future. Although I was a little disappointed and surprised about the 1890.
Hope this helps.