After the 2 came out, I would highly consider it. The first gen one just wasn't practical. Helluva fun ride, but it could barely fit two people on there. I've only seen those stick-like couples fit on there, the others and the rear passenger is holding on for their dear life.
A regular scooter, say a Kymco Jockey 125cc, which is a pretty standard get from A to B scooter, probably runs at around 50-60k, depends on the model. The better more mainstream scooters, like the Yamaha Cygnus-X (also 125cc) can run you up to 80K.
The major downside to Gogoro is the battery subscriptions. Someone above mentioned the 499NT unlimited one month promotion right now and that's an epic steal. However, say you're on x00km/month charge, you're set to that distance and if you go over, it's xNT per extra km. It's like mom and dad gave you an allowance for gas money and if you use it all, you ain't going nowhere son!
I think the below is not a comprehensive list of gas stations in Taipei, but just to give you an idea of gas stations vs gogoro recharge stations...