Received my 4283 a couple of days ago. Pleasantly surprised to find no obvious manufacturing faults. Looks decent, but doesn't quite have the wow factor, for me, of some Hornby steam locos of recent years (L1, Brit, Clan, King Arthur, 4MT). Not fantastically powerful, similar to my 28xx and 2884.
Still, I've fitted the vac pipes and a crew (just need to get some etched plates next time I order a selection). Decent, but not excellent.