I did the one week intensive in August last year. I really enjoyed it. It altered the way I look at bass and learning. The only problem is, you will need to find a teacher when you return home to continue the process. It really is just a taster. I'm not sure where you are at. I have been playing 25 years, and the one week just showed me how much I suck. Really looking forward to 10 weeks of constant playing with no distractions.
You get a bit of theory class in the one week, but again, it isn't really long enough to make much difference. This is why I have taken the plunge, ditched the day job(and an income) for 10 weeks, as I think that will make a huge difference to my playing.