I just saw a commercial for Lumosity, which is a mental-skills training website. It seems like something that someone on LessWrong would have tried, but some googling of the site turns up only some passing mentions. Has anyone actually signed up and used it? Have you had results, and are they worth the subscription cost? (~$5-15/month, depending on subscription length).
I experienced improvement insofar as getting better at playing the games on the site. I experienced a subjective sense of some improved clarity of thinking. One example that comes to mind is that previously I was easily disoriented when out walking and taking more than a few turns around corners. My favorite game on the site was penguin race, a game that claimed to train spatial orientation, and I feel like this significantly improved my sense of direction when I went out walking places. I don't know whether this effect was real or has been preserved. I know that my skill at the game decreased slightly after a long absence, but that learning it again was faster the second time.