how Advantage is better than Hertz/Avis/Enterprise/National
1-you get what you expected. I expected a long-line when I got to the rental car counter and I got it!
2-you get to use your skills. I heard a hard-sale next to me, offering liability insurance, toll pass, a "V6" so you can get up those mountains. "Normally you would pay $400 more for your 6 day rental, but I can get it to you for $150". I was able to use all my knowledge accumulated and put it to good use in declining. The lady next to me preemptively said "we will fill it up myself". She probably also would say "my credit card covers it", which opens her up to "have you ever tried to claim it? I've heard it is a very difficult process ..." Just say "no" with a smile and that's it.
3-you get unexpected surprises. I rented a compact. I got a mid-sized SUV!
On the other hand, with:
Hertz I got a size smaller than what I booked when what I booked was unavailable (even though I had PC)
Avis I got to wait in a long line, even though all the other rental car companies had no line.
Enterprise I always get exactly what I booked and never an upgrade, even though I have National status.
National the "hassle-free guarantee" stops when there are no cars other than Malibus on the executive aisle, and you have to try to find a manager and convince them to give you something decent (cause some employees on the lot just say "that's it").
To summarize, rent a cheap car via Advantage, read up the reviews, and actually go rent it and enjoy the experience!