Well I'm no expert but I'd say it is very smooth compared to something like Colossus. I rode the Swarm a couple of months after it opened and that was the same, as you'd expect from a brand new ride.
I also forgot to mention it broke down on our last ride of the day! We arrived back at the station to a queue of trains - one in the station and another in behind that (and in front of us) waiting to load. About a minute went by and we could see the train in the station had all the restraints open but it wasn't being loaded. It very quickly became apparent there was a problem. Soon after, the remaining two trains arrived behind us and still nothing was happening.
Then the announcements started saying they were having technical problems with the ride, and the engineers were called. They turned up pretty quickly and after a couple of minutes with apparently only a single screw driver and spanner, fixed the ride. It then re-opened a short while later.
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