I purchased a car from Bertera and brought it back to them twice WITHIN 30 days. Each time they said nothing was wrong with it and told me to bring it to Toyota, "they would say the same thing". So I brought it to Toyota and at the time I brought it to them it went over 30 days. It turns out the car needed a new engine.
I was stuck dealing with a lawyer for a year and had to get another reliable car to drive in the mean time. After a year of dealing with a lawyer I only got $1000 while the new engine cost me $6000. I had to save up enough money to replace the engine and at the same time pay two car payments and insurance on both cars.
Another year went by and I was still not able to sell the car by itself so I had to trade both of my cars in for one car. Now, years later I'm basically still paying for two cars due to all of the negative equity, and will be until my car is paid off.