Compartment was of course small but had everything I needed - AC charging/use for phone and laptop. Large people may have trouble getting into top bunk. The curtain gave some privacy. Happy with 5-6 hours of good sleep!
I could not find where to choose berth type when booking. During the journey strong light in the ceiling were on during the whole night. A printout (A4 paper size) of the valid ticket is needed for verification though QR-code verification from phone is available.