Goldistock National Parks calendar pages seem thick and may not curl as advertised.  I'll see at the end of 2018.  The pages of the Sierra Club 2017 calendar we had curled badly. The spaces to write notes in this Goldistock calendar are large and not cluttered with large messages like some other calendars.  I can't figure out why some other calendars clutter their days with large messages since the whole purpose of buying calendars like this is to write notes for the days.  I wish this calendar was spiral bound but we'll see how it works as is.  So far 5 stars.