MS S&T is not meant as a GPS alternative. It is good for routing and finding POI only, including many of those places we all need. I.E. PFJ locations, Walmart locations, State Parks, Rest Areas, and literally dozens of other items with the addition of a
map overlay. This is a very inexpensive tool to use during this important chore.
It has never been touted as an alternative to a GPS unit with ability to add vehicle restrictions. That is why I use both. MS S&T for route planning with a GPS unit for additional planning. I try to pre-plan my trips to prevent those unexpected things.