yes, I have been a student at the ASL 4 times for a period of a month. I recommend ASL, because of its high artistical level and its good organization.
Poses are usually 20 minutes with 5 minutes breaks and half way a 20 minutes break. classes are 3.5 hours.
If you want to get an impression of the athmosphere, go to youtube and type in art students league.
I envy you going there. I can't go before summer 2013!
If you want to know more, please email me at firstname.lastname@example.org
Greetings from the island of Curacao (Dutch Caribbean)