The day trip was amazing! The group is until 38 people, but we were about 26 people, which was a good size. The food was delicious (vegetarian also possible). Hang, our guide, speaks English very well, he gave us a lot of interesting information and he was fun! He even showed us some magic tricks, so he came straight from Hogwarts. Overall, he was really friendly and he did a great job!
We booked the tour easily via Whatsapp and everything worked out perfectly. Cost: 36$ per person.