I stayed at GWSA for ~5 months when I relocated from Aus to SG for work. Despite it being COVID and a strange time to relocate, the staff made me feel home away from home. They were super helpful with any request I had, and the service was brilliant, one time my A/C had broken and it was fixed within an hour.
The pool is fantastic (nearly 50m!), and there are tennis and basketball courts also. Unfortunately the gym was shut for some of my time there due to COVID but was a good facility when I did go.
The location is perfect. Above Great World shopping centre, easy for groceries, and right near Zion Hawker for good food. You are basically on the river which is perfect for walks.
Don't be put off by the lack of MRT nearby, there is a daily shuttle to the CBD which takes ~10 mins, and you can walk back along the river.
Thanks to all the team at Great World for a wonderful stay.