Depends on employer, my employer started charging the HMRC guideline of 25% final payment. (Please note I am not saying all do, many get around this by extending the rental for a nominal fee)
Therefore, the bike would cost me £544.08 (net) plus £200 final payment = £744.08, a saving of £55.92. Bear in mind that a local bike shop who will work with
Halfords give you 10% off for cash, you'd only pay £720 for the same bike, they won't give you a penny if you use C2W.
Worth it if you want/need the free 12 month credit, but if you have to deal with Halfords or a slow admin department, could be a long time before you see the bike.
My colleagues' experience with Halfords is they get everything sorted, get their voucher, turn up at Halfords, who then claim the non-Halfords bike is "out of stock", "come and have a look at our Boardmans".