Has any one used the Jensen NCTP100 wireless Bluetooth TPM?

I was poking around etrailer and saw them for $249 and they use a smart phone with an app and a repeater- kind of curious what people think- I've used etrailer as a retailer in the past and had good luck- and i've purchased Jensen products in the past and they have worked reasonably well. looking for a reasonable cost for TPM monitoring- these would be about $350 for our class C- and use our smart phone-

https://www.etrailer.com/TPMS/iN-Command/NCTP100.html