I used a version 2.4 on my 02 and 04 Sprints. I had great plans to optimize EVERYTHING. All I did was load a couple of other peoples tunes, played with the spark advance (the most dangerous thing you can do), and when it was all over and done with I used the TOR tune. What did achieve is that I could read error codes, reset them and fix problems. The Version 3 is amazing. You can tune each cylinder, balance carbs, etc, etc, etc. My bike is running really well and I thought I could do without a $400 toy that I would seldom use. That was until my engine error light came on and I saw how dependent you are on a dealer without it.
Yes you CAN play with maps, but I would rather just let someone else do the work. There are some really sharp people who actually like to spend hours and hours playing with Tuneboy. Good news, they don't mind sharing.