Dragons don't see a lot of table time these days, but it's not a 100% dud. Isle of Blood has a few non-starters like reavers and the griffon, but I think as a whole it won't do you too terribly bad...
****, if a dragon wasn't 300+ points and had a bit more protection than "my balls are out! Shoot me with a cannon!" they'd be better. 100 point drop on the chaos one in particular would be nice.