First they are excellent. However, I discovered that there were no changes in recent years.  Meaning, if you do not locate a copy for 2011, you can use the 2010 edition. They are almost identical.  Schweser only re-arrange the sequence of those questions, they remain the same. I did all three levels and discovered this fact year after year.

The only exception is the level 3 exams, but not much.  Becasue there are changes to GIP standards, the schweser exams reflects those changes, but it remains 99% identical to last year's.

Good luck to you all!