The two "safety stop" screws on the bottom of the plate get in the way of using this in an Arca mounting base (didn't work with the 2 bases I have), but they are removable with a 2mm allen wrench, NOT the one that is supplied. The idea behind the screws is sound, but they are too close together to work. Probably not a problem with the larger than 25mm plates.
Otherwise, it has the geometry to fit Arca plates, and seems to work fine. You'll want to semi-permanently mount this to the camera or whatever, since the larger mounting screw is only accessible via the allen wrench and not by hand.