Orange Electronis's TPMS

Looked at their very confusing website. The fact they're illiterate in English is one matter. The fact I can't even look up their kits is another. Reviews on Amazon indicate:
1. Good results
2. For as long as the Batteries in each Sensor last
3. Sensor batteries don't last anywhere near the time the seller indicates
4. Replacing battery means replacing sensor
5. Replacing sensor means dismounting the tire, at least breaking the bead down
6. No product support by phone or email
7. Some reviews indicate Orange has pulled out of the US market

On the plus side:
1. JEGS appears to still be selling Orange stuff, at least replacement sensors
2. Sensors inside the wheel is the way OEM does it

For me:
1. When I first read this, I thought "Good economical TPMS solution" and maybe it still is
2. But can I add extenders to the sensor/valves safely?
3. Maybe TPMS "caps" offers a practicality - Specifically custom valves can be used, and (at least from what I read here) Batteries can be replaced

Motorhome magazine just tested the TPMS system from Valor TPMS. They were extremely impressed with the system. The sensors mount to the wheel rim, and are said to be accurate to within .3 degrees F, and .4 PSI. System cost for 6 wheels is $625. Site is: www.valorTPMS.com.

CT51