Since I had to manually book each leg (EWR-SIN, and then SIN-PER), another annoyance is I will have to check my bags twice, instead of just once in EWR like I would have preffered. Also, since my outbound flight in SIN is 15 hours away from my arrival time (to allow for some exploration of the city), I am inclined to think there might be an increased risk of luggage loss.