Tried one
I was presented with one by a hire company for my trip to Cheshire and back.
Awful.
Underpowered, creaky, and with headlights so bad that driving in the dark in the rain was terrifying. I followed lorries all the way back on the A50 because I could not see to pass them. I also doubt that it would have passed them.
Not really much space for luggage either: my tools fit in the boot of an Insignia, but took up the whole car behind the front seats. That isn't safe if you brake hard. I doubt that it would have braked that hard thiough.
Dreadful. And dangerous.