I hired a van from the Bow branch of Sixt at the weekend.
I was totally impressed. They gave me the cheapest quote, their service was friendly and efficient, they even talked me into paying for a reduced excess without going for the hard sell or making me feel I'd been ripped off. What's more: they gave me a lift back to the station when I dropped the van off at the end! The whole experience was of a quality operation working well. I'll definitely use them again.