1.33 Average
The # hours / week of work depends entirely on your work ethic and your team's ethic. It could be 0 hours (if you're a leech) or 6 (if you're not a terrible person). Three experiments, each taking four weeks. The TAs don't know how to grade and will take off points for odd reasons, but it doesn't matter because you'll get a B+ or A- on average. Definitely coordinate with your friends as to what day you'll be taking the lab, otherwise you'll hate your team and do all the work.
Instructor 2.0
Enjoyability 1.0
Recommend 1.0
Difficulty 2.0
Hours/Week 6.0