I'm using a Sea-Swirl. However, "worth" is determined by each individual based on available funds. They are cheaper ways to accomplish returning water to your tank from the sump. It's up to you to decide how much you're willing to spend to do so. When I first started this hobby, Sea-swirls were not "worth it" to me. Now that reefing has taken a larger portion of my expendable cash, I think they are.