I'm assuming that that system is the same as the one for sale at William's brewing. I almost took the plunge with that when I started kegging. the thing that turned me off of it was that the little kegs don't last. I think they advertised a life of seven refills and then they were pretty much junk. Other than that, they seemed like a decent way to make your draft beer more portable. If you just want to keg some of your beer and bottle the rest, there are several options with cornys. You could get 3-gallon kegs and bottle the rest. you could just fill your corny halfway and bottle the rest. You could keg it all and bottle what you need with a counter-pressure filler or beer gun. Or, my personal favorite, make your beer in ten-gallon batches-keg five, bottle five.