I buy it for the trip home every...single...time. It is too much stress to try to remember to check in and hope you have reliable internet signal when you are trying to enjoy your last day of vacation.
On the way to Orlando, it varies. When we have fly non-stop, I don't worry about it. I'm able to check in at T-24 without too much issue and we are a family of 4 who don't mind splitting up. If we have a connection, I will buy it. That way, we can sit as far forward as we can on the first leg so that we can disembark, hit the restroom and grab a bite to eat before boarding the next leg. You never know how long you will have and if we are running behind, I want to get off of that plane ASAP.
When I am comparing flights, I always factor in EBCI the same way I factor in the luggage costs on other airlines. To me, it's part of the fare. If you don't want to buy it, then don't buy it, but don't expect the "privileges" that come with it.