As said A539's are fine in the dry, but no better than most tyres on that price range tbh, maybe not conti's lol.
As for the wet, everyone drives to the conditions, however the tyres offer no re-assurance and often in wet conditions, drivers have to break to avoid objects, puddles, or other drivers.
IMO they are a poor all round tyre and better tyres can be purchased.
I have A048's on my mini, all year round, and found them to be more capable in the wet, however that is also with alot of suspension reconstruction.