not sure what the amex platinum version is like, but I wasn't that impressed with the visa infinite version.

I asked them to go through the craigslist of another city and find a certain car for sale, then return a list sorted by mileage and price. They couldn't do that for whatever reason and just offered to give me the KBB value.

Took me 5+ minutes to navigate their phone menu, enter my card number and get to the service.