I have sets of all 4 Festool clamps. The flat sliding clamping elements, as others have mentioned, do get in the way when clamping to sand work thinner than 3/4" thick. What i do is lay a thin flat piece at each side of such a piece, and clamp to that. The problem with that is that a tenting effect ocurrs with that proceedure. The three pieces (the one being sanded and the two pieces either side of that) will rise up off of the table. To counteract that pesky little problem, i cut the "shim" pieces long enough that i can clamp them flat while applying side pressure to the elements. I mentioned this proceedure as a sanding proceedure. It works also for sawing and routing if need be.
The most used clamps in my shop are (including every type of clamp i have and considering every use of clamps) are those "undersized" 120mm screw type clamps. I don't think i could survive without them. (Oh, i guess i would manage somehow

) The longer 300mm's get used, but it is not often I find the need for them. The "clicking" clamps are probably second in use to the 120's. When they are needed, they are the very best for the purpose. there are times, tho, that the green lever gets in the way.
I have tried those flat screw type clamps (LeeValley, I think) that John Lucas likes. They do have very great advantages in some situations. i currently have two of them, and will eventually get a couple more. they are a pain to work with out in the middle of the MFT table. Any time they can be used along the edge with the haldle out in space, they are great.
Another set of clamps that i use to a great extent are a set of WorkMate hold down type clamps. you place a plastic bushing int the MFT holes (same as they are used with the WM) and then just drop the tail of the clamp into the bushing, keeping the handle raised. When the clamp is in place, you just drop/push down the handle and voila! the piece will not move. I use those two clamps as much on the MFT tables as I do the ratcheting Festool clamps. They are very handy and the handles don't get in the way like with the ratcheting and the Festool clamping elements. They also have a slightly better reach ( 1" or a little more) than the Festool clamps
The main problem you will find once you clutter up your shop with an MFT is that you will find yourself hopelessly entwined on the SS (since you are new, that is Slippery Slope), never to return to a normal life. You will find so many ways to clamp to that table and so many clamps designed to satisfy your needs, you will be absolutely helpless. You will end up buying more and more clamps to be used with that/those tables you will be broken of pocketbook and spitit. there will be no hope for you. I would be very happy, extremely happy

;D :

to take the MFT table off your hands to save you from further psychological pain. 8) :

Tinker