All these advanced possibilities come with one great disadvantage - their cost! All professional solutions have monthly or yearly cost for operating, all the GPS units must be rented or bought, they have to be installed into the vehicles and connected to the different system by specialized personnel so they don’t cause any malfunctions on the vehicles. Once the system has been installed, it can work only with one provider – no intercompatibility. Tracking systems often have no possibility of expanding their possibilities and have no special configuration to suit aspecific client’s needs