i've never used it, but its primary use is in motorsport, given that it's supposed to help stabilise pressure variations with heat cycles. it's more widely available than it used to be but i've always thought that it'd be handier to have a personal supply as i like checking pressures regularly (if only to check for slow punctures, etc - and the act of checking will release air)
i'd say slap some in if you've an easy regular supply - nowt to lose