I purchased Dewalt's 780 12" SCMS yesterday. It required no tuning: 90 & 45 degree cuts were spot on, on both left and right sides. The standard 60 tooth, narrow blade produced smooth faces with some splintering on the exit side of the cut. I haven't measured the bevel cut performance.
This is not a soft start saw and it jumps on start up. The rails glide smoothly and they hold the motor assembly rigidly. Dust collection is very good in my configuration but I felt the need for a modification to the input end of the saw's dust chute. When hooked up to my shop vac the flexible dust chute collapses. I pop-riveted a thin gauge frame (Fastcap measuring tape) to the inside of this chute to keep it open. I also have a Rousseu (sic) dust shroud. I didn't test dust collection with the included bag.
There is a height limiter that allows for dado cuts. I used it and it works well.
There is a visual guide light to show where the blade will contact the work piece (XPS). It's accurate within .5mm, and works on both left and right sides, basically the blade casts a shadow on the work piece. It is controlled by a toggle switch on the handle and only comes into focus when the blade is within a couple of inches of the work piece.
The motor does not lack for power. The table and fence provide more than enough friction to hold a work piece in place with normal hand pressure - maybe too much: smoothly "sneaking up" on a critical cut is difficult due to the friction of the fence. The table surfaces are flat and in the same plane.
This saw is heavy. This is not a problem for me as I have it for shop use only. I would not want to lug this machine to a job side.
I'll update if I discover anything remarkable.
Table extensions are optional.