+1 for the TST system. 3.5 years on ours w/out any issue.
I wouldn't for a second consider a system that didn't provide temperature monitoring too (the pressure pro doesnt). Monitoring the temperature will alert you to more than just a potential tire failure - it could be a sign of sticking brakes (over use of brakes) or bearing failure.
I to use the (screw on) user replaceable battery sensors. Ive been able to buy batteries for a little as 34 cents a piece (including shipping)....I leave the sensors on 24/7 (on both the coach & our jeep wrangler/toad). You can extend the battery live by removing them - since they only transmit when screwed down tight.
I find that batteries last about a year, sometimes slightly longer.
they offer, flow thru sensors, non-user replaceable batteries, and in tire sensors (the factory replaceable battery units reportedly last 5 years & then are returned for replacement at about 20 bucks iirc).
the peace of mind of any TPMS systems is HUGE.
I was spending a lot of time dragging equipment out just to CHECK the tire pressures....most times i did this unnecessarily (didn't need to add any air pressure)...and too many times i just didn't bother to check the tires (BAD)....now all i do is turn the monitor on & only then (if needed) do i drag out a hose!
