Didn't this company also teach unusual attitude and spin recovery?

Sure. They will teach you anything you want - just as long as you pay
for plane and instructor. But you don't really need a T-34 fitted with
cameras for that.

I was looking to take this type of course with a similar group, but
now I
am beginning to have second thoughts.

Unusual attitude and spin recovery is a great idea, and I recommend it
highly. Just don't do it in airplanes that are routinely overstressed
by these weekend warrior antics, and it will be fine. I can think of
at least two places in Houston you can go for that kind of training,
and one of them has very well maintained planes and is taught by a
retired aerobatic competitor (in this case retired does NOT mean that
she no longer flies or instructs).

Given that you fly a Bonanza, the best thing for you would be to find
someone who does this sort of training in an aerobatic F-33. I
remember there used to be someone at IWS (West Houston) who did that,
but that's as much detail as I remember.

Michael