Saigon hotspot

I and my hubby hope to travel in HCMC in December.
We like to find a good tour guide.
We have heard about Saigon Hotspot.vn/
Dear local friends in HCMC...
can you please give us an idea how this work on and please tell us whether is it a trusted team.
Thank you in advance!
Mal

Or you can use Couchsurfing as well