The splitter was very straight forward to fit. I paid £180, but got rear brakes from them too so got free delivery as it was over £200 in total (also I didn't enter the discount code so I got a voucher for my next purchase)
It was just a case of pulling off the rubber standard item, then following the instructions provided.
It just slots into grooves in the bumper along the bottom and then four holes on the side for the mounting bolts and a further four holes along the underside at the front for some self tapper screws.
It mentioned in the instructions about glue also but I skipped that part for now. Got it fitted in a little over an hour, with a bit of assistance from my dad.