Originally Posted by Yardstick
If you don't already have a GPS, I'd suggest going that route rather than the roll chart and holder. You'll probably use a GPS again and again -if you aren't already. There aren't a lot of opportunities (I find) to use a roll chart holder.
You don't need a top of the line GPS. There are plenty of inexpensive models that work great. A roll chart may be fun and nostalgic but it most likely won't get used more than once a year. I use my GPS every single time I ride and have found it to be an invaluable riding tool.