TS just need to take note, top floor has higher ceiling so reno costs would be higher.
Got pros - no one throwing things down or drip/pour water down, no ugly water pipes in your service yard (more space for your washing machine), no one stomping/running above your unit. Cons - longer waiting time for lifts.
As for heat on top floor units, only old HDB blocks have solar panels installed. Some of my neighbors who stay top floor quite happy with their units too. Can sell good price too. But just make sure no rooftop garden above your unit, might have issues like Dawson free entry rooftop gardens.