Top positive review
Follow the care instructions, and it should work fine
Reviewed in the United Kingdom on 4 September 2020
I've always struggled to balance watering my plants and oscillated between drought and drowning in a frequent basis, and a friend recommended this moisture meter. Initially I wasn't sure after reading some of the negative product reviews, but these seem to be mostly from people who have unintentionally damaged the meter by jamming it roughly into thick roots or stony soil, or putting it in a glass of water (which the box explicitly tells you not to do). Some plants prefer having very compacted root systems so you may need to be particularly gentle when inserting the needle.
If you follow the care and use instructions (on the plastic bag inside and on the box) it appears to give very accurate results, and helps me establish when to water my very finicky houseplants, without drowning them.
It's very easy to read the meter and needs no batteries so hopefully it will be useful for a long time. The box includes a long list of plants organised by how much moisture they like which is helpful to match up to the scale on the meter (just bear in mind that some plants want more/less water as the seasons change).
All in all I'm pleased with it so far, and fingers crossed my plants will appreciate it too.