I have not but know a few who have. The all found the lessons informative and helpful. Most will tell you it is seeing targets over and over that is the most help. If you have not shot a lot the $ might be better spent on additional shooting.
This ^
Skeet gets a little complicated with big changes in angle. Every position has a different strategy. I would get a little experience so that some things are muscle-memory, then get a lesson or 2.