I've even seen this carpet as low as 1,5 euro per square meter. I bought some a few years ago to build a mini Z track. Event with such a small scalle the tiny ribs were not a problem ie the grip is homogenous no matter what angle/direction the car is from the ribs. If my previous sentence is not understandable I can rephrase it.

Anyway it's a very good choice considering the price of Ozite.