If those are the 600 users you'll ever have, it's bad. If in the next 3 weeks you get 600 more users, it's average. If in the next 3 weeks you get 6000 more use

If those are the 600 users you'll ever have, it's bad. If in the next 3 weeks you get 600 more users, it's average. If in the next 3 weeks you get 6000 more users, it's good.