Used to own a 04, personally I love it as a learn bike and a commuter not to mention for the price I got. Insurance is cheap and I often clock around 240 miles on a tank of fuel. I liked it so much I actually would like to get another one (may be much cheaper) as a pure commuter for the summer. Take it to the track and you will have a lot of fun on that bike, just remove the center stand and the kick stand if you can when you take it to the track…
Bike should have enough power, unless you are like 300 lbs.
The only advice I have for you is the stock tires are bit iffy, and you will be amazed how a set of Pirelli Sport Demon will transform the bike. With a 130 rear vs the 120 stock you will also loose bit of trail for sharper turn in.
Enjoy the bike! :clap
P.S. Wear gear!