I am also somewhat tech-deficient. I don't have a Kindle (but I don't really want one.) I don't have an iPad (about which I'm somewhat more ambivalent.) I do not have a GPS and my relationship with Siri is fractious at best. But my husband bought me a FitBit a month ago.
If I was trying to make a significant lifestyle change -- like if I was sedentary and was trying to be more active, or if I was trying to lose weight, etc. -- then I think I would probably shell out my own money to buy one of these.