I've used Mr. Beer. Not a bad way to start, because it makes things very simple and can produce a decent beer. But unless you are a real masochist, forget about beer bottling and use plastic 1-liter soda bottles. I know, plastic is not glass, but it makes life real simple and holds a generous single serving in each bottle. Clean new caps are readily available, so there's still less cleanup to do.
The problem with any of them is waiting for the brewing, so you might think in terms of buying two rigs, one brewing while you've been emptying the results of the other. Wouldn't want to run out of beer and have to wait WEEKS for the next batch...