I have had my M Sport for 6 Months. 5000 Miles so far, and 3M is working perfect. The Dealers now sell a Factory Clear Bra Kit. I had mine custom done. I put it on the Rear Flares and the Lower Corner of the Rear Doors. Because we have no sand and salt on the roads like you do up there, not as much to worry about, but the M may be worth it.

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2011 X5 50 M-Sport
2010 Nissan GTR
2006 VW Touareg V10 (Sold)