They're OK.
Not brilliant but OK.
Only real issue I had with mine was the cassette wearing away/eating into the splines on the freehub It hasn't really done that much damage, but can make removing/refitting the cassette harder than it needs to be.
Depends on price though, If I was spending round the £100 mark I'd find it difficult to look past the excellent Fulcrum racing T wheelset from Merlin.