f16 with bmw ppk & dinan stage 1 tune ..worth it?

[Escobar Da_$uN]

just got a x6 with m sport package (should have got x6m mL didn't want to wait )
2nd day i had i some one early tapped my bumper .. so i had it replaced with the OEM x6m bumper now I'm all in fuk it (unless some one takes over my lease 950 a month 15k miles a year white with red ) anyway

need more power dint want to compromise warranty ... i was told that with the BMW PPk ($1200 dealer installed) + dinan stage 1 tune ($2078 dealer installed great sales guy answered all question above and beyond )

my concern is it reliable on long drives ?

and does any1 else have this ? any comments does the sport display reflect gains ? is the power night and day ? thank you