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...
Should I buy my ticket online or through a travel agent?: Most travel agents also sell tickets for lowcost flights. A travel agent usually buys a large number of tickets at once, so that he may have some discount on the total price. But he adds a commission to the initial price. So if you buy your ticket through a travel agent you may pay a higher final price for your plane ticket. It's always a good idea to compare prices before buying your ticket. However, keep in mind that the cheapest tickets sell first, so don't waste too much time comparing!