Good, but not great
Mostly I'll echo what others have talked about. I love Kreg tools. I have four pocket-hole jigs (mini, R3, K4, and K5), mulit-mark, all of the cabinet/drawer jigs, Rip-Cut, several styles of their clamps, have used a ton of Kreg hardware when making sleds and jigs in my shop, and the list goes on. My buddy even refers to me as the "Kreg poster boy" because I've talked about a dozen friends into the pocket-hole jigs over the years. So I'm familiar with their product and was expecting another home run when I bought the Accu-Cut. For the most part it works "okay", but has two main issues that keep it from being good or great.
First, is the relatively cheep phillips drive set screws for joining the tracks. The loosen often and are made of soft material and strip easily. I had to replace mine with some decent allen drive screws from the hardware store.
Second, like most others have noticed is the slop between the sled and the track. You can push the sled tight to the track (pick one side or the other) and then it works fairly well, but you need to be very conscious and consistent during every cut or you can have some less than great cuts. To me if that type of cutting is what I intended I could just as easily clamp a straight edge to my material and push against it.