+1 for Poland (first +1 I believe?
)
Bicycle lanes can be found 99% in cities, sometimes they reach nearest towns and villages but not very often. Also inside city centers this bicycle lanes are not connecting and generally commuting inside cities can be hell.
Outside there are only roads. This generally are of mixed condition but rather of lower standard. New and smooth ones are recently mainly highways and other, where cycling is forbidden. To summarize, riding can sometimes be demanding and heavy on your wrists, but generally is fine for me. Oh! Drivers mainly leave enough space for me, I was only honked on once (guy even leaned out of window and yelled something, scary...) but beware of trucks. These do not slow down or give space for no one.
I've had once a chance of touring in Czech Republic near PL-CZ border and roads were generally smoother.