I purchased it 5 months ago and I have ridden it 5500+ KM. So far, So good. Very nice and smooth ride, wonderful pick-up and noise-less vibration-less driving experience. Solid body and reliable engine.
Problems I faced:
The rubber dampers that are mounted below the seat were broken (my weight is 150Kg). They too were replaced in warranty claim, free of charge and going fine now.
The rear tire was a bit wobbling at high speed (90+kmph). Its road grip was also low (the problem is faced by every new tire untill you drive it for 1000KM).
But to address the wobbling problem, I got my GS-150 new boots (Thiland IRC-NR28 rear tire) and it is wonderful now.
Rest assured, the bike is a gem, the best among all local motorcycles.