Experience with CASE or other IEP advocates?

We're struggling to get our son's needs met at Berkeley High.

He has an IEP, but we need to an advocate to guide us. I've had two extremely helpful consults with the folks at CASE (https://www.caseadvocacy.org/). The first was a free initial consult almost a year ago (8th grade) and based on their guidance I was able to advocate from a place of confidence and I felt the outcome was solid enough that I didn't pursue hiring them. This fall, I realized that we need more support. They gave me some more very solid guidance by email and showed me how to request my son's cumulative file.

One thing that stood out to me was that they mentioned the concept of a "safe and sober" school, where kids are actually checked for contraband. That would be an absolute game changer for us (and for a lot of Berkeley High parents, tbh) but I've never heard of such a thing and all I see on BPN is parents begging for advice about where to send a teen who has returned from residential treatment and can't realistically go back to Berkeley High and stay clean. So I'm a little wary that they're going to tell me that unicorns are real, which isn't necessarily helpful.

I'm getting ready to pay them for a thorough review of that file. But I'm a little surprised that there are no explicit reviews of CASE on BPN, and curious whether other parents have worked with them and had negative or positive experiences?

Cautionary tales?