I'm still using the one I picked up years ago. Don't remember the brand, but it was either Oregon Scientific or something from Radio Shack...I had two at one point. Works fine, and on my last calibration two of them were spot on with one being 3-4 points high. I love them for being able to quickly check on my storage without having to go in and start opening things up, but I HATE having to remember, "oh yeah, that's unit 2, it's 3-4 points high, so that's really....66%, not 70%, OK, I'm good". It's not like it's a huge deal, it just annoys me. If someone would come out with a compact remote unit that was self-adjustable I think they'd sell a ton to the cigar world.