I'm pretty happy with the phil and teds vibe, wasn't sold on the other models as when I tried them in the shop I also found I couldn't stride as I normally would. I don't have this problem with the vibe so might be worth checking out. Also the vibe can be folded with the doubles seat on, you tube is the best place for a demo I found. Wheels etc can be removed if its too big for the boot, and your friend is welcome to try mine to see if it fits! Would recommend a v2 version which has 'phil and teds' written down the strut rather than 'vibe', as it has addressed a couple of the issues people had with the first version. Also, if buying second hand see if the person will give you their proof of purchase, this way if something happens you may be able to get it fixed. Congratulations to your friend!