Well, I'm only at the start of CD number three so I can't say for sure, but I learned enough to walk into a client's office last week and ask, in Spanish, if my buyer was in because I had an appointment with him at 2:00 p.m.

I knew the receptionist at this office speaks Spanish fluently so I piped right up with it.

As soon as I asked her she flew into a whole slew of Spanish, really quickly, so I asked her (in Spanish again) to slow down because I was only learning.

She said that my accent was perfect so she'd assumed that I spoke fluently.

The tone and accent I got from practicing with the CD.

Doesn't answer your question exactly, but I think the CD learning is a step in the right direction.