I'm using it again, and was doing great on it, they graded me a "B" so far because I slipped and got 2 hard braking incidents in the first 4 weeks. You have to be thinking about the device every second you're driving, because if you don't and if you step on the brake harder than the device allows, it racks up a hard braking incident for you. And if you turn too abruptly, it racks up a fast acceleration incident for you. I have not had an insurance claim in so many years I've lost count, yet they're going to not give me the discount I deserve because of this plugin device. And each time I notice an incident on my Snapshot report, I feel bad about it. I'm really looking forward to the day when I send it back to them. IMHO it's not worth the stress you feel when you get a hard braking or fast acceleration. I drive a Toyota Prius. I just feel like I'd rather pay a higher premium and just knot bother with the Snapshot device anymore. I just do not like that thing. I don't know why they can't just give me a good discount based on the number of years I've been with no claims. Greed, I guess.