I use TAD in addition to two standard 5 gallon cornelius kegs to package my beer.
I initially had big plans to hook them up to CO2 with a manifold and everything. That system was a huge PITA, with gas leaks that I couldn't isolate, and I scrapped it in frustration.
Since then I've simply been using them as designed, with the TAD dispensing caps. I have four of those and six bottles, so I can have four brews on tap simultaneously and a couple aging. Each TAD holds the equivalent of 1.625 gallons, or about 17 bottles worth, which to me is really a nice volume. I don't have a big audience drinking my beers like some of you.
I force carbonate them with one 16g cartridge, which takes about 4-5 days til said cartridge has exhausted itself into the liquid. The beer is passably carbonated (to sample) within 3 days. I then replace it with a second cartridge, which lasts until the TAD is kicked. A day after the second cartridge is inserted, the beer is carbed well. They fit easily in a fridge or in other convenient places, like a shelf in my garage during winter time, and are quite fun to use.