Keyless theft - recommendation

I think my keyless entry fob is insecure - it's always broadcasting, so it's susceptible to "keyless theft" (1) (2) (3). I know some cars have motion-sensitive fobs that power down when left motionless. Mine doesn't. I tried a Faraday box, but I'd often accidentally leave my keys in a jacket pocket or on a table. I just found all it a bit inconvenient and I was thinking about disabling keyless entry altogether.

After a bit of searching, I found this "Keyless Protector". It's developed by a Polish company. Pricey at €145 + delivery (a lot more expensive than a Faraday box), but I thought I'd chance it.

These devices are very slim, and sit between the battery and the fob. They contain a tiny motion sensor and prevent power passing to the fob unless certain conditions are met. They consume power from the battery, but I gather no more so than if the fob was always active.

There are two versions. The one I got is "No Tap". Basically, the fob goes to sleep 180 secs after it stops moving, and wakes up again when moved. It's very sensitive, so the fob stays awake unless perfectly still. It protects the fob when left somewhere unused, e.g. overnight, but not if it's in your pocket and you're moving about. It's inconspicuous to the owner, you wouldn't know it's fitted.

The other version uses a "double tap" to wake up the fob. I think it's more secure, in that the fob is protected at all times, even in the pocket. However, it appears more awkward to use, and I read some reports of it sometimes being inconsistent waking up.

I've nothing to do with the vendor, but I've tested this product and it works for me as described. I'd highly recommend it for anybody who's concerned about this type of theft. However, I would also comment that being so slim, it's very delicate. Probably easy to break when installing. And it took me a few attempts to fit, until I worked out how it needs to work.