I have owned several Pietta revolvers, both black powder front loaders and Colt SAA copies in .45LC. They are certainly worth the money, and I have never had any function problems with any of these guns.
They make a large number of the cap and ball revolvers sold by Navy Arms and Dixie Gun Works, and have been making these for decades.
They also make the Liberty line of SAA copies, if I'm not mistaken.
Mark