There's the old saying, "You get what you pay for"...
but there's also the saying, "There's good, and good enough."
This is something you'll need to decide for yourself. I think it should depend on what you'll be using it for, and if you can get by with up to a six second recycle time. For the small amount of use I'd personally get from a set, it would be fine. I'm not sure how well they do for model photography, but for table top they'd be okay, especially with some added accessories they have available:
http://www.tokina.com.hk/products01-5m.htm
You might "google" and try to find a review, or two... unless someone has a set and can give you more information.
Good luck, and let us know how it turns out if you wouldn't mind.