This is a Great City
I really loved Copenhagen. I'm not sure I can put it in words. The people who live here are some of the happiest, friendliest locals I have come across in 17 years of backpacking. 70-80% of the city commutes by bicycle daily. Its got great cafes, great nightlife, a lovely Old Town, lots of harbour and lake areas to explore, it's a little expensive (so is all of scandinavia), but less expensive than other counties. All in all- a great city to visit
Insider Tip:Hire a bike and explore the sizeable city in a quick way. Find flea markets on saturdays and sundays and use "spottedbylocals.com" to find the cool areas to hang out in.