We haven't tested any TPMS but our advice would be to go for one from a reputable brand, like Michelin. The Michelin Fit2Go Car TPMS isn't cheap at £80-odd (and you can definitely find cheaper options online) but you're unlikely to get any form of reasonable customer service from one of the cheaper Chinese offerings. The best thing to do is to search on Amazon and then read the reviews from people who've bought them to see what they think.

There's only one, 3-star review on the Michelin TPMS on Amazon, but this is because of how the sensors look and how big they are: amzn.to/2DvJJgN