I have not been to Berklee Bass Lines, but I have been to the One-Week Intensive at the Player's School of Music. What I loved about it was the staff gave me a philosophy and a direction. Basically - 'here is the direction you personally need to go and here are the tools you can use to get you there. Here is the philosophy that we know works.' That was over a year ago and I'm still working on the material I was given. It was an awesome experience and well worth the money.
If the Berklee program is the one you are interested in go for it. My advice would be to go there not to learn songs or licks, but to find out which direction you need to go to improve and then what material you can work on over the next 12 months or so to get you there.
With all of the videos, books, etc out there sometimes it can be overwellming as to what to work on. Getting around a couple very skilled players who can analyze your playing and give you a direction can save you alot of time and money.
Best of Luck,
Tim