Bought these for my kids. Very good.
These were purchased to work with an older set of Domyos Floor Pads on our gym floor.
The old pads were much more "rubbery" and whilst the "tooths" have the same size, the overall sizes have been changed. There should be a warning on the website entry to say that the specification has changed.
Due to the changes, we had to do much more trimming of the pads and had to relay part of the old array.