I don't think that I would invest much in .today domains. Maybe if it were some type of premium word or really great domain hack. But, I can't think of any words/sayings that would go with .today
No disadvantages in SEO, because TLD has nothing to do with SEO. It is more like a preference, for you and for the users.
eatwell.today dineout.today spoilyourself.today getitdone.today youwantitdone.today youwantitwhen.today courierit.today renew.today startover.today A few to get you started The key is in how they are developed.