I've had a GH1330 for about three years now and it has performed well. I did experience some issues with the power feed on the saddle but this was easily addressed in a similar fashion to lathejacks solution.
My machine dates from 2004 but from what I have seen at warco the newer lathes are well made and quality control seems to have improved. I think lathejack was very unfortunate.
The headstock runs extremely quiet, no excessive slop on gears or layshafts and certainly no excessive crud in the oil bath, although the first job was to drain headstock and gearbox and give them a damned good clean to be certain.
As for after sales, I have no complaints there, Roger and the staff at Warco have always been very helpful andi have built up a good relationship with them over a number of years. ( I've had a number of machines from them going back before the gh1330)
I have to say, I like the look ofthe new gh1236 and would consider it if I did not already have a large lathe.
no association with Warco other than a very satisfied customer.