For zwave, just check the link I already gave you, lots of good discussion there.
Good but affordable window / door sensors? (US, 2021)
As far as Amazon reviews, I find they aren’t always as helpful for the high-tech stuff, even open/close sensors, because at this point in home automation it’s too easy for new people to misunderstand what they’re getting or how it works. So definitely read the reviews, but look for the ones that seem more informed. JMO.