You need to compare the bikes in person and ideally riding each. Hai's are awfully impressive in person. It's a noticeable step up from an Izip (both Currie lines).I would need to add a rack, fenders and lights to catch up to the dash. And even then it wouldn't be able to hit 28mph like the dash. Plus you can add a boost button (throttle type add-on) for $50.