My first RelayRide so I have nothing to compare it to! But I think the business model worked exactly as it should: A guy with a car he doesn't always need at his disposal puts it out there for you to rent. It's an older car, but ran really great—and it reminded me just how much I miss driving a stick!
Ben keeps the car in a downtown parking garage, where you pick it up and drop it off. This means free downtown parking whenever you need it. The Juneau bus can drop you within a few blocks for $2 (I took the express from Auke Bay in 30 minutes, and it stopped right in front of the airport about 15 minutes from town).
Compared to even the last-minute standard weekend rental deal, I paid about half price (weekday savings would be much higher I imagine). All in all, very satisfied with the experience.