The actual unit works somewhat - doesn't do the switch from business to personal very well. If you don't have to use the software to do any tracking of information you may be able to use it without too many problems, but I have to track all the trips in a day and I get kicked out of the software at least 25-30 times. To do what should take a few minutes takes me hours and it is the most frustrating task I have to do to track the kilimoters for business and personal use.