Actually I just did a quote with Geico after finding out about MBI. First, it's NOT automatic if you have insurance with Geico. You have to add it on to your policy, and can only do so within so many miles/days of buying your new or leased vehicle. Second, the cost on a 6 month policy is $61.10. That's $10.18 a month. Given that you're extremely unlikely to use it at all in the first 3 years, that's $366.60 you'll pay with nothing returned during that period - however if you want it for years 4-7 (up to 100,000 mi. - whichever comes first for you), you'll need to decide quickly and have no choice but to "pay your dues" in the first 3 years. After 8 years of paying this $10.18 per month, you will have shelled out $855.40.
This cost pales in comparison to even a minor repair cost after your warranty is up, which is sure to be above $1000 after parts and labor (for me particularly living in California, every service here is ridiculous in cost). Unfortunately after doing a quote for insurance with Geico, their rates are pretty high. They can claim, "save 15% or more" all they want. I'm guessing that's a marketing tactic to draw in massive calls, but it's largely untrue for low risk drivers such as myself. Their quote was nearly $200 MORE per 6 month policy than my current insurance through Costco/Ameriprise.
I'm stuck. Unsure whether or not it's viable to jump ship or stay put. Probably not a good idea to change insurance companies based solely off MBI (mechanical breakdown insurance) for one vehicle.