Look no further. If you are going to an event at O2, this is the place to stay. It is right outside the stadium door. Everything inside seems brand new and modern (not the norm in Prague). We have stayed at multiple other hotels in the vicinity, and while some are okay, there is nothing else close to this one in terms of quality. The room was large and the bed was huge. It is a good 20 minute taxi to the old town, so I wouldn't recommend this place if that's what you're after. But if you are here just for an event, this is far and away the best bet.