what's your goal? I have never used cadence, I can count in my head if I feel like it, but I found I just went with feel. Honestly, gadgets are only important if you want to analyse your data all the time and look at your computer instead of the scenery or what's ahead of you. I just found I never needed it or could be bothered. Getting all tied up in the results just wasn't worth it for me. Just ride and let it flow, get some pointers from other people as you go along.