We have an electronic lock on our front door. It's quite temperamental, like if the door moves a bit, if it's v hot or wet, then it might not open. Also it takes batteries and when they run low it stops opening. We have an unlocked side gate and rarely lock our other doors anyway (Australia) but if we relied on it (or had gone through with our plan to put our place on Airbnb) we'd have changed it by now. On the storage room and garage (where anything of value is kept) we have the mechanical locks where you punch in numbers. I much prefer these, they always work, but they do look a bit uglier.
So for a rental, I'd stick with regular keys.