Hi Stephen,
I had a go on a Freego Wren at the weekend and I quite liked it,it's on my shortlist. It was my first go on an electric bike so I didn't take every thing in. It seemed well made and felt stable I think in part due to battery being behind the seat post. Obviously it's a very different model to a folding bike.
Have you tried any bikes out yet? I tried 4 different models out with different drive systems and they all felt quite different from each other.
if you are anywhere near Tunbridge wells I would recommend you having a look in Cycling Made Easy very helpful staff they will take you out for a test drive. I'm sure they had a Freego folding model in the shop.
Sorry not much help.
Lynn.