For the vast majority of owners, the free maps are just fine.
Download a bunch of muffler maps and try them until you find one you like.
I did so, exactly. Found one that was good, definite improvement. Then spent $250 (AUD) for the custom map and its a different bike, smooth and predictable instead of twitchy and awkward. Seems stupid not go get a custom map if you've spent more than double the cost of a custom map on the pc3
$300-400 US for a custom map? I think not.
Its not about the power (who really needs more? not me), just smoothening the power out, meaning its more rideable, more confidence inspiring, etc. etc.
And as for being not necessary for the average rider, neither is a PC3
. For me I just see it as value for money, ok $500 for a pc3
to get a 10% improvement, but $250 more for a custom map which makes it a 100% more enjoyable ride.
If it bothers you just think about it as part of the servicing, keeping it from running lean or rich. Extending engine life maybe, etc