I have one of these. picked it up at about 6 months old for £1500.
pros - cheaper than a grom, approx 90+mpg (im 100kg and managed that real world), tyres are cheap (ditch the stadard tyres, theyre deadly in the wet), great fun, easy to ride.
cons - upgrade parts availability is not as good as the Grom, but still ok if you can wait. stock gearing is not great for the heavier rider, but an £8 front sprocket change will see you topping out every gear with ease, and still hitting approx 65 in top.
i love it as a quick, fun alternative to the Mille it shares a driveway with. it's no