I agree Sheila. For most people, the best environment to do the course is the one they are presently in. Not that it makes it easy, but it works as an reminder that it is "a required course". The relationships with people at home or at work make the mess in our mind very visible and often quite painful and therefore hard to forget or deny.
I have been keeping in touch with the Course for 3 years, but I didn't seem to have enough time to give it appropriate amount of time to be considered a serious course student. But when our doughter was born and I had to face the negative emotions which came as my reaction to watching a crying baby, I figured out that the time came to become more serious about my mind trainig in order to deal with it in a way I would possibly call successful. I can't imagine a better classroom for me since there were no escape nor a way how to fix the situation on the level of the illusion.
So I still have a long way ahead, but at least I got myself moving again :o)
Petr