I have one laying around somewhere, learning to use it has been on my to do list for years, maybe someday. Unfortunately my inner luddite recently reared its ugly head. I primarily used HP38 and 48 calculators my entire career and my trusty 48GX gave out on me a few months ago, I tried the prime couldn't adjust to it and ended up finding a "like new" actually was new 48G+ in beat up packaging from Amazon for $150, I was excited and surpised as they were discontinued in 2003. The 48GX's are like freaking gold on Ebay so I guess I'm not alone.

I have to say I was skeptical of Dynamos a couple of seasons ago but it took less than a month of riding with one for me to appreciate their value. I build my own wheels so for me the price of a dynamo wheel is $50 more than a mid range front hub wheel. Electronics to charge a phone will add $100 to $200 more to the setup and owning a Sinewave Revolution and Forumslader recommend the Forumslader. Do people need electronics while touring, no, but there's a lot of conveniences people can live without but tote along with them because it makes their trip more enjoyable.