Buy genuine IMHO. Heard of too many problems with aftermarket ones.
It would be interesting to see if the garage put the washers back behind the new discs/bearings. Or if they were missing in the first place. If they were/are then thats why they've failed quickly!
When I changed mine yesterday, there were no washers behind the disc/bearing. Looked like some crap rubber things had been stuck in there. Good job I ordered them from George at the same time as the discs/bearings!
I'll be dissapointed when i take my rear discs off to not find the deflector washers behind them, they were missing on my last Clio as well.
G 172, out of interest how much for OE rear discs delivered? PM if you prefer