Its a company car so it only costs me the BIK tax.
I've driven
Mercedes c350e estate
bmw 330e
bmw 225xe
audi a3 etron
golf gte
All have 'normal' engines. The c350e was the best by a long shot, so much smoother, properly quick with nearly 300bhp and with a 2.0turbo petrol when the battery is dead, still not lacking. Lovely spec and smooth with the air suspension.
330e was the next best but lacking family space.
225xe was good from a family point of view, 4x4 as its the same drivetrain as the bmw i8, just not as well resolved as a package.
From a cost point of view, in company car tax, the c350e estate is about £90 a month, as a ref point, a6 tdi estate, about £250....
I wouldn't do it if it was my cash as I'd never justify £40k on a car.
The technology is great though, I like the idea that the battery is just a supplement, all have a real world petrol engine.