Bootstrap gives you some set of solutions for grid system, styles and CSS tricks, and JS components. Some of them are not for you, but it is not the all-or-nothing choice. Take a loot at it as the nice default to start with, which is aesthetically correct ;) and portable. If you will leave this default without customizing then your site will be similar to all other products leaving the same default, but it is good starting point. Button styles and navbar in BS are the same in most BS products, but also button styles are the same in most products that do not use BS ;)
