Of the many IE based browsers Slim Browser was my favorite mainly because of the simplicity and ease of use. For me, it was also the fastest of the IE bunch, edging out Maxthon by just a bit. But there has yet to be an IE based browser that I would use as my only browser. I've jumped onto the Opera/Firefox bandwagon and no other browsers have impressed me as much as these two.

A great browser in a client-server office network environment. Great feature set without all the unnecessary overhead