I use Granat exclusively these days on all three of my sanders (ETS EC 125, Rotex 125 and DTS.) I have Granat abrasives from P80 up P500 and find these cover everything I need. Plus it is simple because no need to worry about the differences in style. Need smoother, go to a higher grit. Need to remove more material, go to a lower grit.
I find that Granat lasts a long time. Maybe all Festool abrasives last a long time. I would not know since I am all Granat all the time.