ALEKS is working really well. We have been using it in algebra 1 lab every other day for 40 minutes and the students are great with it. They have accepted it as part of the routine and they are happy while they do it. It seems to me that they are better mathematicians as a result of all of this structured practice, but I don't have any data to support this. Their midterm grades were no different from typical, I will also check again at final exam time.