E46 M3 Rear Refresh / diff clutch pack

[s2kdagjd]

Hey Guys,
I'm doing a e46 M3 Rear Refresh right now and wanted to get your feedback on diff clutch packs.

Basically is it worth doing?
What's the Pro's and Con's?

[S54330Ci]

Do you track the car or street only?

Street = M Variable
Track = 3 clutch 30/90 ramps

Diffsonline.com is your source.