I bought this for my 25ft trailer after seeing many positive reviews. It was relatively easy to assemble, but for some reason the tires weren't aligned to run. Although the sensors are labeled RF, LF, RR, LR, they were not shown in those positions on the monitor. However, the instructions that came with it were pretty easy to read and I was able to reset the sensors and then resync them in the correct position. After that there were no problems and everything went great on our first trip. The included non-stick pad worked great on the dash. After the trip, I simply installed the monitor in the trailer and it's ready to go next time. My only problem is that it can monitor 7 tires but only contains 4 sensors. I would like to get a 5th sensor for my spare part but I can't get an answer to this question. Otherwise it was good value after the first ride, especially considering how much RV rated systems cost.