I bought one, used it for 50 rounds of 223, then sold it for a $35 loss.
With that said..
I could not get the function down. I set it up per the instructions, I watched videos, I looked at 'how to's' and simply could not get it to run appropriately. It was set perfectly, when the Swage rod entered the primer pocket perfectly, but I couldn't get it to swage properly. It was taking A LOT of force to try to get a swage and I deemed no longer worth it. I did not find it any faster than my Dillon Super Swage 600, either. Put all these things together, and I ended up selling that tool and sticking with the SS600. I never have a doubt about the swage from that tool. The fact it arrives with a warranty to work appropriately, and that it doesn't void the warranty on my press, I'll stick with the SS600.
These are my experiences and I know others have success stories. I did not though.