Vert good hotel were to stop for a layover in Warsaw.
There is a good shuttle service from the airport, pity that on the site it is not specified WHERE and WHEN to get the shuttle.
For info, go on the Departur floor, cross the road to the Renaissance hotel, when you have your back at the entrance of the hotel, on the right side there is the area where the shuttle will stop, and the timetable is marked there....