i have the nissan juke nconnecta hybrid, i am getting well over 50mpg. the electric motor is charged by the petrol and they work in tandem sometimes together, at lower speeds its electric only then the petrol kicks in and takes over at times. the regen braking is excellant but doesnt bring it to a stop you still have to apply the final brake.
the qq and xtrail e-power is different again the electric is primary drive and the petrol just recharges it very clever.
i hand the juke back next may and the juke is on the list as theyve added the tekna and tekna+ for a lower ap than i paid last time. the qq is a consideration but is a bit big for my needs i am on my own and so far dont need wheelchair or scooter. the qq has gone up as has the xtrail this quarter so the juke is in the lead at the moment.