Well, the ride took about half an hour, so the boarding time is every 30 mins. From my opinion I think it was nice for me but I think the old people might have a difficulty taking off from the cabin while boarding.
You can enjoy the nice view of Singapore, I think it's pretty worth it, just only once in a life time~
Or you could make it more romantic by sitting and sipping a glass of cocktail with your loved one
For your information:
Opening Hours
Opens daily from 8:30am to 10:30pm (opening on 1 March 2008)
Approximate thrilling time
30 minutes
Location
30 Raffles Avenue Singapore 039803
http://visitsingapore.com/publish/stbportal/en/home/what_to_see/themed___other_attractions/singapore_flyer.html