I can only judge CR based on personal history, we bought a Toyota 4 runner and an FJ Cruiser and CR said they were pretty much bullet proof. 95,000 miles on the FJCruiser with 0 issues and 55,000 on the 4 Runner with 0 issues. I'm saying in general they pretty much get it right because there ratings matched my personal experience on these and our Clubman S.
1995 325i,1996 328ci,1997 528i,1997 Z3 2.8,
2001 X5 3.0,2001 330i Conv,2002 M3 Conv,
2003 M3 Coupe,2004 M3 Coupe,2004 Z4 3.0,
2004 X3 3.0,2007 X3 3.0,2007 335i Conv.,
2013 X1 28 sdrive M Sport