I just moved into 8 Mount Sophia two months ago. I live in a 1 bedroom...block 10.
the positives are: good location (close to Plaza Singapura and 2 min walk from MRT, close to Orchard), good amenities. The apartment building connects to Plaza Singapura, which is great as there's a Carrefour there, and you could practically get anything there...
the negatives are: the
property is not that well designed, as it's a hassle to get in - i have to go through the side gate and walk through the garage to get to my apartment. The front gate is far from everything, so you need to access the side gate, which is facing Handy Rd, and close to the MRT. Also, they crammed a lot of apartments into the small space, so it feels crowded.
There are many empty apartments in the building because it just opened in December/Jan, and the market has been slow. I would assume that the building is going to be more crowded once people move in (it's now actually pretty nice since it's quiet). I think you could probably pay $3,500 now for a 1bd if you negotiate hard as there's a lot of apartment for rent...
Overall a good choice to rent, but i would buy some place else for $1,400 PSF (might be lower now given the market).