Fitbit Alta Fitness Wristband - Plum (Small)

I bought this a couple months ago and have used it everyday since. The accuracy is terrible. I get reminders to hit my 250 steps per hour goal. I've got these while driving, yet somehow I get a message to tell me I've hit the goal, yet I haven't walked...

I bought this to replace my Fitbit Flex. I love the Fitbit as you can keep track of your fitness but also sync it with other apps to keep track of calories, workouts, etc. Whilst I get more information on the Alta than the Flex I just find it very...