I arrived late around 11pm and called the 24h call line when I arrived at the Plumeria Hostel. I was welcomed friendly and didn't have any problems with checking in.
My room was big enough and I had to share the kitchen and bathroom with two other travelers. Everything was clean, the shower worked perfectly and everyone was nice and respectful.
Usually the check out is between 10-12am, but my flight was scheduled at 11:30pm. I asked if I could leave my luggage in the room and luckily it was no problem at all to keep the keys for my room a few hours longer.

I highly encourage people to rent a room in the Plumeria, if you are young, have a low budget and don't mind the noisy road.

All in all, I was happy to stay at the Plumeria.