I prefer the Despicable Me movies to this one, hands down, but my kids liked it ok so I bought it some time later (although honestly it got hidden away and then forgotten so we haven't even opened it yet!).
Okay, DM was great, and DM2 was even pretty good, but the Minions were stealing the show in both, so it's fitting they get their own movie, and it lives up to it. While Gru appears in it, the film really stands on its own -- highly recommended for everyone. The format is also great with discs that work in both old and new players and a download code so I can watch it on my Apple devices as well!