Born and raised in San Jose, I have only heard of Sonics. Before going to this location in Pheonix, I thought it was some sort of urban legend.
Sonics is such a tease. It has a bajillion commercials on tv about it's smoothies and slushies, but the the closest one to my house is a good 30-45min drive in the boonies. When the bf told me there were Sonics a-plenty in Phoenix, I HAD to go.
AND I WAS NOT DISAPPOINTED! Despite all the hype from the commercials, I was not disappointed at all. I loved the berry-lemon slushies I got. The menu claimed that it would have real fruit in it, and yes, right there at the bottom of my large cup were a couple of real lemon halves. =] I can die happy.
The novelty of ordering through a weird parked car drive through thing was pretty neat too. I'm a fan! Now if only there was a Sonic closer to home...