The factory rear floor mats are small and don't stay in place very well. These have better coverage and stay in position much better, not to mention they are easy to clean. However, the sides are low and they leave a gap around the seat rail (as do most floor mats), so there is still potential for dirt to fall out. If your goal is maximum dirt trappage, perhaps a more utilitarian design, with ridges to capture dirt, would be better.
Are they worth the $40 I paid for them? Ehhh, maybe. Depends on if $40 is too much for "better than factory but not perfect".
Paul Mini Moto Brake Front / Rear Black
05 November 2018
Probably the best road linear-pull brake out there.
These are fantastic brakes. If you want road-compatible V brakes, you can get TRP CX8.4s for about half the price, and Tektro RX5s for even cheaper. Do these work many times better than the RX5s? I don't know about that. But they're incredibly well made and they do work really darn well, so for me, they're well worth the investment.
The biggest benefit is the custom quick-release noodle design which requires much less rim clearance to open up, which means you can run your brakes with very little clearance and much better lever feel with no loss of functionality.