As I recall that was a bit of looted ferengi technology from somewhere or other.

It worked by subspace transport (Which therefore gave it superluminal range/speed) and had horrible degradation on living tissue.

Which brings me to another point. Though I agree that the dominion wouldn't mind throwing Jem'hadar through an unsafe transporter, bear in mind we've seen Vorta use it quite a bit.

Now I can't imagine a Vorta going thorugh one unless explicitly ordered to by a founder....