It's much more niche than Pandora, but I can see that if you like the kind of music it plays (mostly poorly-recorded very-indie rock songs of about two minutes in length, as far as I can tell) then you might like it better than Pandora, which has the downside that it seems to wind up playing a fairly small subset of songs on rapid rotation, at least in my experience.
Pandora aims to replace radio. This just aims to replace one radio station. Good luck to 'em.