Appy S.

I like the quality of their nail polish. Didn't chip or lose shine for a week. You can customize your box or swap items, which is a plus. They have discontinued the option of skipping a box. You get that option only after getting 10 boxes in a row or something.
Unfortunately, 2-3 new nail polish a month is way too much for me. They have hardly any other beauty products, the ones they have are not very enticing, so I had to cancel. The cancellation process went pretty smoothly for me.

WORST. CUSTOMER. SERVICE. EVER.
I enjoyed playing the games. Whether my brain improved or not, is debatable.
Trouble started when I discovered that my account was being accessed by someone else. Lumosity was of no help. Even after repeated requests, they have not suspended my account, nor provided a refund. Utterly unhelpful customer service. They're blaming me for giving out my password to someone.
They lack the basic measures of security available on ANY website these days - lock the account after 5 incorrect password attempts. They don't have device authorization like Netflix or Facebook does.
Beware of what you're getting into. There is no way to contact customer service except email. And they take DAYS to reply.
Took my money and evading a refund now.