Hey I love AP freerolls. I play at least five a week.
It takes a very long time to get to the final 100...then it just creeps along. I have placed a handful of times at the final tables, and a good number of top 100 finishes.
The payout is really not worth your time, but if you place in the top 5 you get quailifier for the $1000 AP challenge which is great. Other than that it is great experiance for playing in a large field of 2000 players.