I hate the fact people say IE is bad, people should stop stereotyping it.
IE11 is really fast and you can get adblock for it, and that makes it a great experience, specially if your the type of person that doesn't or rarely uses extensions, I have no idea where people say its extremely slow, if its slow, IE can tell you what is causing it to slow down and then you can disable what is slowing it down.
I just want to make it clear that there are two versions of IE11:
IE11 Desktop
IE11 Metro
Metro IE does not really support Desktop Extensions so to get adblock on it, you need to add a privacy list, Fanboy's list is available for Metro IE also.
Seriously, don't bash it for its history, try it for a bit, just make sure you don't have toolbars, as their the worst things imaginable, and make sure you have the menubar and statusbar hidden so it has a clean and sleek look.
However please stay away from older versions of IE, like IE10 and bellow, that is where IE got a bad rep.
I use two browsers, IE is my main and Firefox is my secondary, I don't use chrome because google filled it with bloatware like all the g+ stuff and irremovable default extensions that are not necessary, not to mention the extreme ram usage and the fact it runs 4 processes in the task manager...