I would rate ZERO stars if i could! I had an Intoxalock installed for a year. The ONLY positive is that they have service centers all over the place. Everything else about them is HORRIBLE! Customer service?...Good luck! For the sale, they will chase you down and be attentive to you UNTIL you sign up. Then its bye bye customer service. If you can get someone, their mostly overseas customer reps, thay have little knowledge of the issue. Hidden fees?...Absolutely! They charged me SHIPPING COSTS for self removal of the device (I'm an electronic tech, but it's not rocket science), because I guess they couldn't profit off of the service center charge! AND they had all types of small admin fees! WTF!! They lie about waiving calibration date violations due to Acts of God like BLIZZARDS, so that they can get a lease extention on you. VERY disingenuous and unscrupulous company. And the most important fact...you have to blow, suck, blow on their machine RIDICULOUSLY hard to submit a breath sample!!! I mean RIDICULOUSLY!! I felt light headed the first few times I did it!!! Other companies you just have to blow. And they find a way to charge you for everything!! They are grifters praying on our misery and misfortune. Do you know how many times I almost had an accident on a rolling retest having to blow, suck, blow while on a turn, on the highway, at high speeds, on a turn, bridge, tunnel, rain, snow, dark of night, etc??? These rolling retests create an unsafe distracted driver situation in general, but THIS device??? MONUMENTALLY hazardous!!!! Avoid these people at all costs! Or it might just cost you more than some unforseen fees...