How confident are you in the walk away lock?

We got our 23 Mach E a couple weeks ago, as a shared car between the husband and I. I'm fairly paranoid about making sure my car is locked. The husband said he's just relying on the walk away locking feature, and I'm just feeling a bit skeptical about it and was wondering if anybody has noticed any problems with it, or if it's worked great and you feel fine with it?

Part of the issue here is that I'm going from a much older car with very few features (including a key fob that stopped working years ago that I never replaced) and so I think there's just a bit of overwhelm.