Hahahahaa Sethu Anna, the former (in bold) must have been more painful for you than the other consequences
Out of my personal experience & belief, simple manual method is good. Check all the windows before you "Lock" and walk away from the car. By this, I ensure both the points, "Whether I locked the car?" and "Whether the windows are closed?". However, you will still get those doubts when you are placed in a position where you can't move out to check. That's inevitable for people like us
I mean, enthusiasts...
I have critical question on the "Delay" Mechanism for quite sometime. I believe, it rolls up the windows after the doors are locked. With that, I understand, on click the lock button in remote, all doors will be locked and the blinkers/siren would work as usual and then, the windows will start rolling up. Now, what if one of few windows are intruded during roll up? Will it stop or not? If yes, then it would defeats the security as anyone can try to intrude. If not, then highly possible for accidents like putting fingers in it, maybe children?