I highly recommend these. Installed on my 2015 4R and they made a HUGE difference off-road and daily driving when hitting big pot holes. I just ordered another set for my Tacoma
I've had these on my 09 since 2016. Unfortunately the passenger side bump has loosened from the mount plate. They do improve the ride but I may look at something else as a replacement.
Mostly for extra clearance under the axle, smoother transition over rocks if they do come into contact, and so that you don't damage the u-bolt threads, making removal difficult.