Subaru calls the 2010 Legacy a response to what its customers wanted — durability, value and performance, with a bit more cabin room. Those customers ought to be happy: The Legacy is all that, and it should continue to serve as a mildly unconventional alternative for buyers who equate Accord or Camry ownership with a voyage of the bland. Whether Subaru can go toe-to-toe with those heavy hitters, however, remains to be seen. The Legacy will find its buyers, but until Subaru irons out some usability issues and moves its cabin quality upstream, its midsize sedan will have a tough time breaking into the mainstream.