In reply to Gordon Stainforth:
I've had an E-Go Max (yes that's really its name) for about a year, current sale price just over £1500, so a fair bit more than the BIKFUN at £1000. The specs look similar (that's to say much bigger than a Brompton) however the BIKFUN is 7 kilos heavier at 27 kilos, which by my standards is a bit of a beast, and I have no way to compare robustness and reliability etc. Also check that the seat post extends far enough to suit you, and that it packs down ok to fit where you need. Mine goes neatly in the boot, which is extremely convenient but not relevant for you, and I've taken it on the train a couple of times without incident. The folding sections don't clip together but I could solve that with a bungee cord.
I've had a lot of use out of it, but no really long distance rides (max about 50k); I would say I could get about 75k out of it, depending obviously on the amount of ergs you use. I covered up the awful lime green EGO MAX decals with black tape, which solved that problem It does well at very steep -I've been up short sections of 15% while looking pretty cool, and if I'm knackered after a long day out, it makes easy work of the trip back to the car.
The only major issue is how to leave it somewhere securely. I've obtained a variety of gear suitable for mooring a cruise liner, and more usefully, a knackered-looking garden bag which fits over it neatly. In town I would not leave it on view and instead would try to leave it with a friendly publican in return for a promise of a meal later etc.