The incremental improvements add up, and no one will complain about the lower price tag.
Bose QuietComfort 45 review: Some serious noise-canceling - CNET
Bose QuietComfort 45 Review
Bose QuietComfort 45 Headphone Review - Consumer Reports
bose quietcomfort 45 review: Should you upgrade to these?
Bose QuietComfort 45 Headphone Review
Review: Bose QuietComfort 45 -- another great set of headphones with near perfect noise cancellation
Save 40% Off the Bose QuietComfort 45 Wireless Noise Cancelling Headphones - IGN
Bose QuietComfort 45 review: A great noise-cancelling headphone
Bose QuietComfort 45 review: The sound of silence