I have used this guy pretty ruggedly for a year sailing offshore and hiking the appalachians. It's small enough to keep with me anytime I head out of cellphone range and gives the wife peace of mind whenever I'm soloing. Luckily I've never needed to use it, but I never forget it. Highly recommend filling out a trip plan online before you head out. Lets emergency folk know you're for real and tells them what to look for should you actually need help. Only drawback, battery life isn't as great as the big clunky ones, but it suits my personal needs perfectly.