I have a 20" wheeled folder. I would have preferred a larger bike when buying it but it has to fit into my tiny campervan so there was no choice but I've had a non-leccy folder previously so was used to it.
As for the leccy folder, I love it. I've zoomed around my home area, back and to across the Severn Bridge, up Yat Rock (+20% gradient!), along canal towpaths, through the Forest of Dean, around the Elan Valley, toured castles on the Welsh borders and am currently planning the Taff Trail. It might not be quite what a folder is designed for but I'm not going to let that stop me!