This class is primarily run by the TA, but it is organized and structured by the Professor, and the lab manuals are reasonable and can easily be completed in an hour or two. Except for the first one, which has a four-week time frame, you have two weeks. They were designed to be completed at home, but there are still lab lab sections available for additional help. It makes no difference which one you are enrolled in; you can attend any of them.
The labs essentially test the concepts you learned in ECE 10, up to Second Order Differentials. All labs require the AD2, so if you loved it in ECE3, you're in for a treat!