I've been asked a number of times to teach sidemount. Though I could self-certify and I had a good course, I lack the experience to give class that is not worse than useless. If I taught sidemount, I'd resemble that remark.The elephant in the room here is that quite frankly I've seen more than a few side mount instructors that don't know beans about side mount and turn out really poor side mount divers - even by OW standards - turning out "low mounted" divers with horrible hose configuration, poor trim, etc.
A class offered by an instructor of that caliber is probably worse than useless.
I would not personally even consider a side mount class from an instructor who did not dive and teach that configuration on a regular basis in a cave environment.
And the advice I give to people, only take sidemount from someone who are cave certified at a minimum.