Popdz use to own one, wait for his comment.
As for me, I had a chance to drive it for a day. It's under power - make you tired or stress from driving. A/C not enough on a hot day, felt like porsche/ferrari oven.
If R2 was priced at no more than 350,000 bahts, then maybe its worth considering. Otherwise, honda Jazz at 600,000+ is a much better choice.
Spare parts? forget them. MIT will fly in parts for you - at a cost, but don't expect it to stock any parts. Only a handful were sold.
Published mileage is around 24 km/liter. A real world driving? Popdz will tell you.
Just my opinion krub. Beauty is in the eye of beholder. I don't think its worth buying, but if you like them - don't let anyone
you.