I used it a couple of weeks ago to plan out our summer trip. I don't know why you don't see the mileages/times, they show up along with the routing instructions for me. It also presents non-Good Sam parks for my consideration though some parks in the database are missing (e,g, KOA Eureka, MO ).
It does not yet show any points of interest however and each trip is limited to 25 stops which is not enough for me.
Just the same, I bit the bullet and signed up to RV Trip Wizard. It blows the socks off of the GS Trip Planner. However some of the routes it comes up with don't seem to be RV friendly and manually changing the route by dragging waypoints doesn't seem to work very well.
There are other trip planners out there.
Dave & Mary
2012 Denali 289RK
Ford F250 Lariat Powerstroke 6.7L Diesel