I was disappointed, I looked at routes I am familiar with and found the information not very useful and if the book in my opinion is not good enough for what I already know then I will not trust it. Let me give some examples the book is slanted to descent, useful yes but as an RVer towing a travel trailer ascent is equally important and one could argue more important because we do not have the power as a Trucker. In New England I look at Massachusetts I see 6 triangles , but only 5 entries, don't know what 6 is but Ill not go there because I do not what to have any issues. Now look at number 5, very brief info on eastbound descent but no info on ascent, yes one could assume it was the opposite and that there is a 6-7% ascent but more info would be nice, does the road widen to allow for climbing lanes are there areas to pull off and where if I am overheating? Great idea but not worth it to me, I tow a 35 foot trailer and knowing accurate info would be very helpful. Maybe future version will be improved