I purchased my C2 in January of 2002, but only started regular rowing December 2003. I started with the holiday challenge and have participated in every challenge since. I am now working on my second million meter club. I have now completed 3 half marathons and hope to do a full marathon in the near future. One technique I find useful on a longer row is to cover up part of the display. I have done it even on 10,000m rows, but especially on half marathons.