FOOD: Astons provides really cheap meals! It started out as a western stall in normal coffee shops and slowly expanded to individual restaurant. There are quite a number of outlets around Singapore. My friend and I visited the Changi Airport Terminal 1 outlet (Just opened on 15 June 2015). There are three main types of restaurants - Specialties, Express and Steak & Salad.
PRICE: The prices on their menus are NETT. Yes, there's no need to worry about the 17%. Check out the food prices on the online menus: http://www.astons.com.sg/menu_delight.htm
Their main dishes come with 2 side dishes which you can choose at your delight from the given choices. My friends have placed Mac & Cheese at their top chart. Water is FOC.
AMBIENCE: (Depends on which outlet you're going) Changi's outlet was lit up with warm spotlights which gives a pretty romantic ambience. There are quite a number of seats but do expect long queues during meal time. Enjoy your meal with classical music.
SERVICE: After knowing your table number, you'll have to order your food at the counter on your own. Next, you'll be directed to your table. Food will be served shortly like approximately 10 minutes. There are quite a number of waiters/waitresses on the ground which you can approach for help if you need any.
CONCLUSION: As a west-sider who seldom take an hour trip to the East for food only, I'd try out their other outlets! If I'm going Changi Airport again to send others off or to be sent off by others, I'd definitely come back to T1 ASTONS:)