I usually visit their branch at Gading Serpong. Their main branch is actually located somewhere in BSD but I don't know exactly the location. This Gading Serpong branch is run by his son.
The restaurant is always crowded, swarmed by the locals no matter in weekdays or weekend. They only serve one dishes, Soto Betawi, with two different varieties. One is the ordinary Soto Betawi that we already know, and the other one is their signature dish called Soto Oseng. Soto Oseng means the meat is stir fried beforehand and served separately with the soup. We can chose the soup with or without coconut milk which usually we call it by Bening and Santen. Other than the main menu, they already have side dish menu such as Potato Cutlet (Perkedel Kentang), Corn fritters (Perkedel Jagung), Tempe Mendoan, etc.
As for the meat itself usually it is beef but they also have chicken which is less popular. We are free to chose only the meat or mix it with innards. For the innards itself we can also chose which innards. So, basically when you order your soto you can shout like this to the Abang : "Bang, one oseng. Mix. Santen. But I don't want the intestines. And give me a lot of rawit." Of course this kind of special order need longer time to prepare since they have to oseng it first. Usually I only order mix without specific order to make it faster.
Although they open until 5pm in the afternoon, but make sure you come early if you want to have their Soto Oseng. The Oseng usually sold out very fast after lunch time. So get ready to get disappointed if you come late. The price for their Soto Oseng is IDR 30K with rice. Quite expensive for just a soto but it worth the taste. For me, this is the best Soto Betawi that I ever had. Very tasty with perfect seasonings. If you call yourself a foodie, make sure you try it before you die!
Food - 10/10
Cleanliness - 7/10
Service - 8/10
Ambiance - 6/10
Price/Value - 8/10
Update July 23, 2015 : They have already invade mall with the opening of AEON Mall branch (2nd floor food court area)
Soto Betawi H. Mamat
Jl. Bulevar Gading Serpong Blok AA4 No. 23
Gading Serpong - Tangerang
+6281318642362
Business hours : Mon to Sun 8am - 5pm