I ran with the stage 1 map on my LGT for a month or so before getting parts installed and tuned. Unfortunately, I can't recall which octane map I used. Frankly I don't even recall it being an option.
It was a noticeable bump in power and ran as smooth as stock, iirc, if not better. I guess my experience disclaimer would be that this was over 4 years ago on an LGT.