there are altogether 3phase.... phase 3 just launched in recent one month. but I not sure the one booked 60% is phase 2c or 3

from what I know, higher floor is more expensive because of the guarantee view. and the loan is disburse later, so your interest will be less till the developer is working on ur floor.
for DIBS project, then higher floor better if price is not too much difference.
just my thought
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