I recently aquired the 12t, 28t, 48t (fine finish) and 48t (composite) blades.
I used the 12t and the Composite blade this weekend. I was only ripping 2x doug fir, but I was very pleased with the cut quality of the rip. Very smooth and easy cut for such an aggressive tooth.
The composite blade was REALLY nice. I used it to cut some reasonable quality 3/4 melamine. I did use the chip guard (right side), but I got very little chip out on either side of the cut. I did not use a scoring pass, and my feed rate was fairly fast. I was just making some shelves, so I wasn't too concerned, but I would consider the cut quality to be high enough to produce some decent (melamine) cabinets.
I haven't tried the 28t or the 48t (fine finish) yet, but I'm very hopeful based on the performance of the other 2.
I would also point out that the 12t blade took a very, very small piece of the splinter guard on my first cut, (from where the 48t Festool blade had it trimmed), but after that, the 48t composite blade tracked that same line perfectly. I'm hopefull that the other 2 blades will produce similar results.
I'm also beta testing an 80t blade for the Kapex that I was very impressed with on making quite a few cuts on 1x oak last weekend. Very smooth finish cuts with virtually no tear out. Also a very quiet blade. My reference was an 80t Freud Diable blade on a Hitachi SCMS, and the 60t standard Kapex blade.
I'm very anxious to see what they come up with for the TS75. My only reason for trying these blades is because I don't want to replace splinter strips on my rails constantly, but I also want to use the appropriate blade for the task at hand.