Looking for a hardware write-blocker

I was browsing a page on NIST because I'm looking for a good hardware write-blocker. The page had links to their benchmarks on a bunch of them, some from Digital Intelligence, MyKey, and Tableau (amongst others.) Does anyone have any recommendations? What do you use the most and why? I've heard about Digital Intelligence, Tableau, and MyKey, but I haven't used any of them.