For the price - great.

My first bike, i'm only 17 so a brand new 125 for only £1400 was a good price. I've had it for around 7 months now. I'd be lying if I said I had no problems with it, but the problems I have had have all been relatively minor and sorted by a cheap trip to the mechanic. If you keep on top of cleaning and maintaining then for the price you should be happy with it. A comfortable ride aswell and a decent speed. However I would recommend you keep an eye on your fuel indicator. It will stay at the top for multiple rides and suddenly decrease, so try and keep that in mind. Overall it's very economical, cheapish to insure, though i don't think it will last me for years.
Regardless, a good first bike.