I had Dewalt plunge track saw for over a year. Nothing to complain about. The plunge action is a bit weired at first but I got used to it. I modified Dewalt to accept Festool off-cur splinter guard - took me 30 min. The track allows to clamp to narrower stock due to central position of the channel. This is the part I miss most working with Festool track saws. Also, the Dewalt guide rail router adapter fits multitude of routers from different manufacturers. It could be used with Festool rail, but needs to be shimmed to remove all play - no big deal, really. Major con of Dewalt track is having splinter guards on both sides - makes it impossible to butt the rail against a T-square for 90 degree cuts on sheet stock, - you have to mark it on both sides of the sheet, then carefully align the rail. Also, since they have only one channel making DIY parallel guides (no OEM version produced unfortunately) is problematic (although not impossible). Dewalt clamps are awesome. I sold Dewalt saw and rails with almost no loss and bought TS75, - only to have deeper cut capacity. Thinking of getting a lighter TS55 to use on the same rails, but might get another Dewalt since it glides on Festool rails as well.
As a final thought I think Dewalt really dropped the ball with pricing and marketing of their awesome tool. Had they dropped a price a bit and insisted on big box stores carrying this product in stock so that people could see it, touch it and maybe test it in stores they would have sold tons of those saws. Offering parallel guides, rail adapters for jigsaws, etc. would have also helped.