Unexpected bad experience.

Positive 1. The customer service during pick-up was fast. 2. The customer service during drop-off was equally faster and smooth. Negative 1. I booked a Jeep Cherokee cause I will be driving from San Diego to San Francisco and would need a bigger car so my family will be comfortable. They changed this without notice to a much smaller Buick Encore without any explanation. 2. I ordered a toddler seat for my 5 yo kid and confirmation was sent for this. But at the time of pick-up and I ended up travelling to from Carlsbad to San Diego Airport ( a total of 1 hour ++ trip) and end up wasting half-a-day of our planned trip. 3. and because we have to adjust our trip, we have to extend our rental. 4. I have used Hertz before and they would normally explain the gas and time of return, I totally forgot about these things because of the rush and I ended assuming that I need to fill-it-up in full. I also found out that I was being charged to pay for overtime time charged and I needed to call the customer service to cancel the charges.