Positiv points : Tam and her family is nice. You have private room and Vietnamese meals with your host.
Negativ : Not really the same work than in the description. It's teaching English by Skype or an another platform. I didn't see that on the pictures on Worldpackers. It's ok but a little bit disappointed to not have real persons in front of you.
It's difficult to hear students. Sometimes she asked me to do more hours but she told me really late so I didn't have the choice. We were two for the work but I did it alone.
It's my personal experience and perhaps it will be great for you !