I had a bad experience with Halfords. I paid £450 (including 10% discount) and waited two weeks for a slot for fitting. After dropping off, I returned two hours later and they hadn’t done anything. They said they couldn’t get the Bose unit out! I was fuming so was refunded the full amount of £500 ?? and left with a cob on. After all this a rattle under the steering wheel became apparent that I couldn’t trace so I took it to Carl at CBS in Nelson who after rummaging about, told me they hadn’t bolted the Bose unit back on, the screws were missing and then handed me their screwdriver that he found under the drivers seat! The upshot now being, I’ve bought the same unit (Pioneer SPH-DA230DAB), all the bits and pieces to finish the job including steering wheel control and dab aerial, and Carl is fitting it next week. This is all costing a bit more than the £450 at Halfords, £491.89 to be exact plus a round trip from Fleetwood to Nelson, but at least I now know that the job will be done by a competent and not a snotty nosed kid straight out of school.
btw, the car is a 2012 Kuro Edition (mk3.5)