I use them all the time. Have two ventile ones, one made of 'arctic' cotton (heavily shrunk canvas), and one made of polycotton (G1000). The best one in my opinion is the ventile versions, although they were pretty expensive whe I bought them. They're made by klättermusen (klattermusen.se models njal and nunatak), the next best is the 'arctic cotton' version from Norröna, called arktis, it only made in red and white though. Be sure to buy the wolverine or wolf fur rim. The fjällräven models are ok, but nothing more.
Bergans have good reputation, haven't tried nordmarka. Yet.