Garmin StreetPilot GPS

We used this GPS on a trip from Philadelphia to Charlotte to Orlando.The unit gave good directions but I did have a few issues with it.It would lose the signal at times which isn't really very reassuring when you have no idea where you're going and you just hope that it comes back online before you make a turn.Also, at times it doesn't give you enough warning that a turn is approaching or operate ata very low volume so you wouldn't hear the instructions.I'm used to mapquest and being able to see the whole route ahead of time and being given the option to use a different route and that is not available with the GPS system.My husband uses this all the time in his work truck and loves that he finds new, more efficient ways to get to local areas.Personally I think I'll stick with mapquest.