No, its crap! You need the correct keys for the unit. 4 flat metal slivers. If you use the wrong removal keys they can get jammed in the unit and need the dash out to remove them, or brute force.
Halfords are numbskulls who prove once more they know nothing.
Get a set of the keys off of ebay, there a couple of quid. Then pick up a tested working replacement, or a 6 disc Sony unit for under £100. Cheaper than getting the one you have fixed. My Ghia came with a 6000CD single disc. Keys in, unit out new unit in. Job done. The keys need a bit of finesse and only work one way. The curved side of the key faces inwards, towards the centre of the stereo. You'll hear a click as the keys latch home. When all 4 are home, the unit will lift out with ease.
I got a local ICE dealer to pull mine for £5 because I too had been to Halfords and got the same rubbish story. ICE man said it was garbage. Onlya problem if you ram the old round pins in the rectangularslots! Halfords staff are backward, its just the way it is!
2005 Focus C-Max 1.8 Petrol Ghia + Sony 6 disc, 2007 tail lights, Led bulbs all over and HID front fogs.