My experience with TRUECar was not a positive one.
1. I used TRUECar too soon, before we decided on exactly which model we wanted. Unfortunately, three dealers now had my phone number. And dealers who have your phone number do not use other means of communication, no matter how hard you try to carry on a discussion over email.
2. TRUECar gave me MSRP and average actual purchase price of a given model (in my case, for a Prius V Model Three, $29,320 MSRP and $28,251 average price paid). But when I click on "View Pricing on Local Inventory" it shows me two very different numbers (again for Prius V Model Three, $28,060 MSRP and $27,163 average price paid). So TRUECar has trouble presenting a consistent view of its own numbers.
3. The certificates it gave me were a joke--above MSRP or "visit your dealer".
* "Your Guaranteed Savings Certificate is for no more than $304 above MSRP for any in-stock 2017 Toyota Prius v Three."
* " Your Guaranteed Savings Certificate is for no more than $1,059 above MSRP for any in-stock 2016 Toyota RAV4 Hybrid XLE."
* "Savings data not available for this vehicle. Visit your dealer to get available savings."
Without TRUECar's help, I got $3700 below MSRP.
4. TRUECar only applies to in-stock vehicles. You can see that if you read enough of the fine print, but I didn't notice it. Since none of the dealers had exactly what we wanted, TRUECar was not useful unless we compromised on something.
5. The second time through TRUECar web site with a different model, it notified dealers more quickly than expected. I thought I was still entering information when I started getting calls from one of the dealers.