I found the company highly rated on Home stars, which is what really made me decide to hire them. Even though it was pricey, the quality and workmanship was great. A total of 3 winodws had custom jamb extensions put on them... to aviod using quarter round (which I don't like). A window sill was added, along with window casing (of my choosing). He filled in all the holes with wood filler and sanded it down. So its ready to be painted.
I ran into a problem with the retrofit windows upstairs because the moulding I picked out originally was not large enough to nicely cover the chips, dents, or holes in the plaster. So he used casing I had from a previous reno. Acutally gave me his vehicle so I could go buy another piece of casing.
Also another great thing, is he left all the unused materials, including sills. So I can use them when I switch out some of my other windows.