I purchased a Tiretraker pressure monitoring system in Quartzsite, AZ this year. I hadn't worried too much about having a TPMS until the toad kept giving me a low pressure alarm (turned out to be the spare). Anyway I purchased the system and couldn't be more happy. We just came back from the Tiffin factory in Red Bay, AL where we saw a lot of tire blowout damage to wheelwells and storage bay doors. Before the TPMS I checked tires each travel day and "dinged" them at each stop. While that provided a better look than never I find comfort in continuous monitoring. The Tiretraker system uses replaceable batteries which I love rather than having to send the sensor back to the factory everytime a battery needs replacing. On the Red Bay trip we had tremendous rain, freezing weather and snow and the sensors never failed to work. I just took them off the coach and toad and inspected them and they showed no traces of water intrusion. The original monitor had problems shutting off. I emailed the dealer, he sent a new one no further questions asked and only asked I return the defective one back to him using a prepaid mailer. Can't ask for more than that! I highly recommend this unit - the monitor receives signals from all 10 sensors without a booster unit (36 foot coach and toad). Now I check the tire pressure every morning just by using the monitor to scroll each tire's condition. In fact when I inspect the tires before traveling I often take the monitor with me and verify the pressure at each tire while walking around the unit. I recommend the Tiretraker system, especially because of the replaceable batteries and because of the reasonable cost compared to other units I saw in Quartzsite.