My sister have a unit there. For me, Block A and B is total disaster. The lift always broke down not to mention vandalism. The upper unit they said is quite ok but for me it is not a good place to live, the environment is bad. Try to go there during night, you will get what I mean.
Basically Block A and B are low cost apartment (1 bathroom + 3 rooms). The parking is free, but if you go there after office hour the chance for you to get a parking is very low unless you get a unit with parking.
Thats the reason why the rental is low.