I have tried Roti Pratas in and around Singapore and I must say that the Prata @ Kampong Café at 60 Joo Chiat and Ubi Block id exceptional in taste compared to others.
The prata is not oily and its texture is just right to tear into bite sizes, with the use of the fork and spoon, unlike others. Also, the fish curry that comes along with it adds to its mouth-watering taste.
It's very cheap, in my opinion. Around 50 cents a piece. Not bad if you're on the lookout for a cheap alternative to high-priced pratas.