My personal experiences with TLV security is that they are professional, courteous and very thorough. My Israeli contacts suggested I turn up about 2 hours before my flight. My bags were thoroughly security checked before they could be checked in, they were run through an X-ray machine and then opened in front of me by a security officer who had the image of the bag in front of her. I was asked a few questions about my stay in Israel, a few items in my bag looked at and then off to check-in. I guess it took about 3 minutes or so.
The regular security check before you go airside was very simple, I guess you have been profiled before you get there.