Definitely read those links, but I want to add, it is really very simple. For some reason everyone reads more into it and makes it very complicated.
We found it sooo simple to use and saved us a ton of money, had great meals and excellent service. Make your ADR's around your park doings...
i.e., if you want to see illuminations make your ADR at Epcot, Wishes, make them at MK, etc.,
We did use one of our TS's for lunch, a late lunch, 1:40. Worked out great. Broke up the day had time to relax had more than enough time to do a few more rides before Spectro and Wishes. Got a place on the curb, grabbed a CS and watched the show.
It is so simple to use, really and the staff at WDW is very helpful if you have any questions.