I had my first TPMS message flag up the other day. Nice to know that it works. Tyre was down to 26psi.
I'd been to timber yard and picked up a screw. £10 for wood, and £16 to get puncture fixed. Lucky it wasn't a new tyre.
Usually use Formula 1, have done for about 15 years - considerably cheaper than competition.
I always tell them the tyre I want having looked online - not what they want to sell me. Always order online as much cheaper too.
Recently saved over £120 on 4 new tyres - changed from run-flats.
Only issue is how long you sometimes have to wait for fitting.