With the TireMinders you have to manually scroll through to check PSI and Temp (taking your eyes off the road for quite sometime fiddling with it) and my TireMinder would randomly lose the signal from time to time.
I replaced my TireMinders with the TST 507RV. We logged over 3,000 miles with the TST 507's this year and it was flawless never losing a signal. While drive you don't have to push any buttons to check your PSI and Temp, the TST 507 unit scrolls continuously thru every tire showing you the PSI and Temp (totally hands free).
2015 Rockwood Windjammer 3029W Diamond Package
2014 RAM 2500 Laramie Longhorn 4 x 4
6.4 Hemi 410 HP, 410 Rear Axle