Personally I don't think mapping is very important at all on familiar routes. If you have a smart phone, you already have detailed maps and a much much better screen. If you're going to be in terra incognita all the time, it can make sense to pay extra for instant access to a map without having to pull your phone out, but...
Also, if it's generally familiar routes with occasional changes, being forced to think about your surroundings is probably good for you.