skychief-
Milton has a bit of a rep for being 'a pill' but most folks don't have any issues with him. You have to take what you read on the net with a grain of salt.
I owned one of Milton's bows built spring of this past year. The bow was 100% a shooter. 70" Lonestar Carbon 2222C, hands down one of the most accurate and forgiving bows I have ever shot, ever. It was a tack driver. The only reason I sold it was that I wished so bad it was 5-7# heavier.
As for fit/finish, well I can't compare it to a Jim and Buddy bow, but for any bow I would call it "decent". Lets say compared to a Toelke being a 10/10, the 21st was maybe a 7.5-7.8 /10 at best. It was a lovely bow and seemed well constructed but in bright light you could find a fair amount of sanding marks and also there were dull spots in what was supposed to be a semi-gloss finish. Let's put it this way, it was perfectly functional and fine for hunting, just not 'work of art' level.
The thing to consider is the performance you get for the money, I think the one I had with exotic veneers and the carbon lam ran right about $600, simply a lot of bang for the buck considering what a shooter it was. In the hands of a better archer than myself that bow could have won any 3D shoot it wanted.
Would I buy one again? Sure.
Edit: in regard to my finish remarks, I think Savage chimed in and I have also noted others' comments on various forums, Milton seems to have some consistency issues. I guess I got lucky and the one I owned was generally a-ok.