I've been twice. Last time we went to Anne Frank's house, Ajax stadium, ehh walked around the city a lot, went to the giant I Amsterdam sign, laughed at the Red Light district which is really hilarious and surreal, went to an awesome casino just across the road from the Marriott, went drinking and once went to a coffee shop but I didn't have any brownies. Also went to a sex show, hilarious. It's a very nice pleasant city, the waterways and houses are really beautiful. It's famous for its zoo but didn't go there. Drink was similar to Irish prices (so: fairly expensive) BUT the measures of vodka are ridiculous so much cheaper overall.
The amoiunt of bikes is odd, it's soo different. When crossing a road you have to cross the cycle lane, the actual road, and about 5 tramlines, then the other cycle lane before safety. Because cycle lanes are so underused in Dublin it does take a while to get used to not drifting into the cycle lane..you will get a lot of abuse if you do! It's a beautiful city to walk around and enjoy, great atmosphere. However every single touristy shop having such an emphasis on drugs and sex was sleazy.