This is not a clamp used stronger than KliKlamp Bessey (another quick lever clamping system but that is not made to fit on a rail) and much weaker than presses quick-release GH series of Bessey, which also operate on the same principle but which distort the rails if such clamping force was used.
That said, to attach the rails, it's really good; it will slip into the rail, and the rail clamp sufficiently to hold it in place without the risk of deformation.
The finish is exemplary. The only flaw is that it's not a clamp with one hand, as can be found in DeWalt for the same application.
When you buy a saw on Festool rail clamps have a planned storage location in the cabinet of the saw, making sure you have the clamps on hand every time you use the saw. And that's really convenient.
