Arval PHH have been around for a while in the company fleet sector, do fuel cards and all that stuff. We had 75+ diesel focuses and mondeos through them couple of years back.
Like all lease deals, just really watch excess mileage and minor wear and tear. They can be absolute sharks on the hand back..... Don't think we had one with at least £500 recharge. But look after them though (our engineers didnt!!!!) and there are some cracking deals out there.
Before I took the JCW on, I had a quote for a 520d Auto Saloon M-Sport with a few extras - metallic, stop-go cruise and HK sounds for around £330/month with £1k down from Nationwide Vehicle Contracts.
Worked out that the £35k BMW was roughly the same as a £25k JCW in terms of deposit, term and monthly payment. Work that one out!