Lesson Study - Math

I'm reading a great article called Using the Lesson Study Approach to Plan for Student Learning by Lenski & Caskey. Last year, a group of us went to DePaul University in Chicago to get a "hands on-minds on" experience with Lesson Study. This year, the same group is currently involved in a Lesson Study for our district. Just curious to hear if anyone has any experience with Lesson Study and can share feedback, etc.