Bus at night

Hello
I am planning to ride a bus from Iguazu to Posadas over night. 1st Is Andesmar the bus line for that? 2nd Would you think it's pretty safe if there are 2 of us?

Thanks so much for any help.

There are plenty of buses on that short route. It is safe.

Jorge Daniel Barchi.
Buenos Aires.

Jorge:
Thank you for always helping everyone, and so quick to respond. You're a good ambassador for Argentina!
Gracias