Magellan - Maestro 4040 GPS Receiver Review

The Magellan Gps - Reciever, my friend purchased this product.  Last March we set out on a trip from Mobile to Little Rock Arkansas in a rental carl from Enterprise Car Company we were traveling to Conference that is held every year in differnt States.  The conference had been held in Little Rock,  at least two other times.  Once we traveled on a group but and another time we had traveled in a rental car, using a driving map we had downloaded from mapquest. 

She had program the GPS unit the night before.  The unit was working pretty good, at each

turn or exit it would give a little beep a few minutes before we reach or exit it would talk and tell you, you have reach you exit.  The problem started when we stopped for gas, after we were ready to take off the Unit had went to blank so, we had to enter our destination again and the unit ask if we wanted the shortest route or the quickest route, after entering the quickest route it gave us a whole different route, so it continuously told us to make a u-turn and go the other way