Never flew one. Only had them at Line Maintenance at AMS for departure. 737-200 they flew most to AMS. I have been inside one of them. It has all those brownish colours. Looks quite old. Can't remember if it was half business.
Once on departure a 737-200 from this airline had problems with its yaw damper. Also it didn't get an oil pressure indication on engine #2. The aircraft came back to the gate and the Oil press. indicators where swapped. Now the problem was at engine #1. So the problem was probably the indicator. Only there was no person with a 737-200 authority to sign the paperwork. The Ground Engineer refused to do this. The management in the end forced the aircraft to go, without an autograph.
Personally I wouldn't fly this airline.