We tried it for a few months and went back to cameras and desktop as well. It was unable to access vehicles across multiple rooftops all at once. Connectivity was also an issue for us. Ultimately, it was the quality of the photos that moved us away from it. Just can't compete against a nice DSLR.
With that said, it had a great interface and was very helpful for lining up the photos. It just wasn't appropriate for our specific needs. I would recommend it to a smaller non-highline dealer, with perhaps 10-25 vehicles on the lot. IIRC, the pricing was pretty reasonable. Back when we used it, they did not provide a player for the interior and exterior 360 shots. If that hasn't changed, your dealer will need to see if that's offered by their current website provider.