I've been to Kiev four times with England. Decent city. Airport is about a 30-45 minute taxi ride from the city and the traffic can be bad at times. Be careful of dodgy taxi drivers outside airport. They will try to scam you for at least double the price. Given that the exchange rate has crashed that still won't break the bank but it's more the principle. Only use the official rank taxis, Sky taxis are the best. Never get a taxi from someone who comes up and asks you.
Plenty of bars in the city centre. I wouldn't recommend TGI Fridays or Irish bars as some have on here. Loads of places less than half the price and never had any problems with the locals. Kiev is predominantly pro European.
The stadium is in the centre and easily within walking distance. Places worth seeing if you want an hour off the beer are Independence Square with its large Nelson like column and the two churches just up the hill off it, the green one is worth a walk up it for the view and the City blue one is well worth seeing inside, all sparkling gold and incredibly ornate.
The underground is cheap and has some of the largest escalators in the world.
I definitely would have done this trip if I'd had a bit more notice. Anyone who goes will enjoy it.
In fact I'm going to edit this to say that I will happily come over as a tour guide if someone wants to pay for my flight. ;-)