Tbh it seems steep given what the unit is, Corsair used to outsource to CWT for it's entire RM series (RM/RMX/RME) last I checked but I think they've changed to a different OEM for the RME.
It's the cheaper end of the RM line, so probably a worse fan and caps. It also has a 7 year warranty vs 10 for the likes of the RMX or Shift.
It should be absolutely fine, but if I was spending £125 on a PSU I'd not want it to be a lower tier unit for the range. You can pick up a 850W Shift for around the £120-130 mark, assuming your case can handle the side loaded PSU connectors.
Alternatively the MSI MPG A850G can be had for £110, which while not the best should be on a similar level to the RMe, I think CWT might be the OEM for it too but don't quote me on that.