About half of its members are not Dutch, despite its name, but American, German, Japanese etc. The newsletter appears three times a year. Two issues usually consist of 32 pages, while the third one has about 48 pages. Current and back issues of CFF are available for NKC members only. They also organise a Cube Day once a year in the Netherlands for members with talks about puzzles and where new and second hand puzzles can be traded, bought, admired etc.
Institutional membership is also possible.
The complete index upto and including issue 50 is available as a single excel document . Theo Geerinck Star Octagon An assembly puzzle with pieces made out of parallelepipeds. To make it puzzle several constraints are added. Review of several new puzzles. March 2, 2001.