Fine.
I have used it with no suit, a shorty and a 3mm suit in warm water. It is the only single wing I have so it also gets use in the pool and in lakes with a drysuit. I used it in 20C water recently with a drysuit as I didn’t want to discover it didn’t have enough lift for a 6mm suit the hard way.
I would not use it in the U.K. sea though, too small.
It is a very nice wing. The fittings and build are nicer than the other wings I own or have used. One of the people in our club just bought the 30lb version and will be trying it in the pool for the first time tomorrow, so I am prepared to recommend them to people I actually dive with

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Thanks Ken. Your quick responses are greatly appreciated.