We had a couple of late 90's Civics on 0%, it was the only deal going in those days.
Checked it out in Excel and it was better, probably as savings interest rates were much better then, although there were potential sneaky charges such as 'final documentation fee'.
UK credit agreements have to disclose commission, and I would not expect a manufacturer led 0% offer to be directly beneficial to the sales staff unlike HP, PCP etc.
One benefit/flaw may be 'lemon protection' as the credit firm owns the car for the term.
When out in California last year I saw the Fit EV was on $199 36 month lease, gets even better if you've got solar to charge it.
($199 a month; no down payment and unlimited mileage, routine maintenance and collision coverage included)
--
TG