I drive an E-nv200 which is Nissan's van based on the Leaf running gear.
I love it; it's quiet, refined (for a van) easy to drive and incredibly cheap to run. It costs me less than a fiver a week in electricity for around 10k miles per year.
The new Leaf has just been unveiled with a larger battery (more range) and there'll be an even larger battery next year.
Unless you can get an amazing deal on the current one it's worth waiting until the new one is available early 2018.
I think Nissan still offer four day test drives which would I'd certainly recommend.