This depends on what kind of person you are. For some, this stuff is way too much of a pain to spend time on. For others, it’s a great way to earn extra miles. The Hawaiian Airlines toolbar has gone through some changes, but you can still earn up to 1,000 extra miles per month for searches. Of course, these toolbars are only for the miles. They pretty much suck otherwise and shouldn’t be used on your main browser.
