I have two. Both seem very nicely made. The finish is a match for the LMT A2 upper on my daughters AR. A close but not spot on match for my sons colt A1 upper.
All of the parts go in straightforward, and everything functions as it should, lower to upper fit is tight, mags go in and out easily, etc. etc. on both rifles.
I have 7 of them and all of the ones i have put together went together great. I have used Olympic Arms, DPMS, RB Precision, and Bushmaster lower parts kits and they all went together easy and with no problems. The RB Precision first time builder kits went together the easiest. Their roll pins are just a hair smaller than the others and they go in easy but not loose you still have to drive them in with a punch. I mean they are like a .001 smaller or something like that.
As for color matching they are or will be the same color as most the big makers because Superior is changing anodizer. They are going to start using the same anodizer as the big boys are.
I did have one that had a fit problem with an Olympic Arms upper but i think it was the upper and not the lower as that upper had the same fit problem on a Stag lower i had. Most of my Superior lowers are the blems that RB Precision offered for a while. So i refinished mine in Norrell's SOCOM flat black.
All their lowers are Mil-spec. And they are improving their lower's all the time to make them better than Mil-spec.
So all i can say they are the best lowers for the price.
I will not own any thing but a Superior Arms lower . They are very freindly people and will go out of their way to make everyone happy. RB Precision is great also. Robert and Krista are the best dealers on the boards if you ask me.
Superior Arms web site
RB Precision web site
I have one on the way.
RB Percision appear to be a class act!!