I did an Evo school this past summer. Not a good experience. Got there to find only one instructor for the entire group - nowhere near the ratio they'd advertised. Found out Jean had prewarned some people, but not others. Also had offered partial refunds to some, but not others. I contacted her afterwards and politely complained, since I was in the "not other" group for both of the above. I was told I'd get the partial refund. Still waiting.
I had always heard the school had a good reputation. I guess some things DO change.