decades ago... nice, smallish city, very pretty in parts... Tivoli Gardens worth a visit ... three days max, I would say, two might well do. Like all Scandinavia, it's expensive.
that's pretty good - even better if meals are included, since food and drink costs money. If it's at this time of year, remember the days will be short and the nights long, and the temperatures quite low.
We've been there three times in the past eight years. We love it. It's so easy to get around on foot.
We took two different guided bus tours (translations in English & various other languages on headset) and a canal tour. The latter took us as far as the Little Mermaid statue.
There are a number of nice little cafes where tourists can get coffee or snacks. The staff all speak perfect English.
You must spend at least half a day at the Tivoli amusement park. If you don't have the nerve to go on any of the amazing rides, just watch others having fun. That's real entertainment!
Copenhagen is expensive but you'll enjoy every minute of your visit.