RR:
Having worked (flown) with graduates of HAI, I would recommend them highly. I don't know Helistream.
If you can afford it, HAI's CAA course is much more comprehensive, ( read employable in N Sea ) than the simpler FAA.
Alas, Sasless, our training from Uncle Sugar prepared us for Air Mass Weather, Southeast Asia, and little else.
Still. we are functioning. Aren't we?
Chas A