Hi andy
I went a few years ago, stayed on kurfurstendam. Was good sat outside the hotel with a glass of wine watching the many porsches and amg mercs using the street as a bit of a race track in the evening!
Went up the tv tower on Alexander platz which is worth doing cos you can see the difference between the east and west. Went to the Reichstag aswell, if you go, go early otherwise you'll be queueing for hours-not sure it's worth it tbh though.
Check point Charlie museum is good and there are nice Places to stop for kafe und kuchen on unter den linden.
Found a couple of good restaurants one was a vegetarian indian and it was really good. The waiter looked exactly like Valentino rossi aswell ! Unfortunately I've no idea where the restaurants were cos it was a few years ago ! One of them may have been near Alexander platz behind a main street in a cobbled area with quite a few restaurants/bars together and loads of seating outside
a boat trip along the canals/river was also good and you get to see the buildings etc from a different perspective
I really liked it and want to go back some day