Disclosure: Referral links.
$15 a month is a definite improvement over $20. You can cancel any time, apparently, so you don't have to be locked in for a whole year. You can read my review of the service here. I just got my second box, and I'll review it soon.
By the way, it's not clear to me if this company is called "Choix" or "So Choix." There doesn't seem to be any consistency in their media. Weird.