will you get the credit training

I'm about to begin looking for my 1st year MBA summer internship. So far I've been focused on sell side investment banks. My rationale being that the IB's are a good platform to get the credit training needed to expand in other directions.

However, a recent MD friend of mine recommended looking at some Mezz and PE funds.

Has anyone worked as an analyst or associate for any of these funds? Does the buy-side due dillegence give someone an equivalent level of training?

Treavor