I flew to Bangkok in the afternoon, and I had an early flight the following day, so I wanted to stay close to the airport.
The receptionist did not speak a word in English, and when I asked for lower bed, she just kept repeating "no possible, booking.com", however, the dorm was empty, when I went up.
The entire hostel was super clean - dorms, bathrooms, common area, looked like someone was just finished cleaning.
A/C was just OK in dorm, not too cold, curtain around the beds, huge lockers.
Evening receptionist was really attentive and spoke English :)
Breakfast was provided - unfortunately no fruits at all, so I could not enjoy.
Although I found 270b a bit expensive for a dorm bed, it was worth it before an all day flight to Europe.