Don't know too many specifics, my one trip to Saudi was a quick 4 day there and back using Jeddah. The impression of the airport wasn't terribly wonderful. Bit dark and stark in equal proportions is my memory. Not sure there were many "facilities". But this was 6/7 years ago so things may have changed.
The flights were something else. Nothing horrendous but I hadn't been prepared for the on board prayer area with the GPS driven pointer to Mecca. In the case of my 777 it was about the last 5 rows of the central block at the very back of economy. On the outbound flight there were a few pilgrims and I was taken aback having waited a very long time for the toilet to find it was swimming with water when I got inside. My understanding is that the gentleman in front of me had to cleanse himself before he set foot on Saudi soil.