Expect the worse. Deliberately left 30% of the luggage behind in Jeddah because the plane was overweight. No Eid gifts for the family. Part of the luggage arrived in Islamabad after my return and was picked up by my family. Part of my luggage still missing more than 3 weeks after my journey. Customer service unresponsive and has no clue how to deal with the situation. The lower fare definitely not worth the hassle...
Reserved seats?: Lately, some bargain airlines started selling "reserved seats" on the plane. However, the seats are all quite similar and even if you don't reserve a seat when you book your ticket you will still be able to choose your seat when you board the plane or you will be assigned one at the check in desk. So you can easily avoid paying extra money in order to reserve your seat.