My son went to Kumon in this summer. He spent all his summer until August but couldn't learn any new thing. He is six and they asked him to repeat the same level of math for atleast three times and took all his time in doing 200 pages for three times while he already knows the concept. It was just additions, which he already did in kindergarten. And the staff was really rude, and when I told them that I do not want to continue they did not even ask the reason but they took extra fees for last month even though my son didn't go the whole month.
My experience is very disappointing with Kumon. They are just interested in money and don't care about your child's education. This is my experience with Kumon located on Spring Cypress in Spring, Texas. Maybe other branches are different.
Bottom Line: No, I would not recommend this to a friend