Totally agreed. I also lost a little respect for Hipmunk when I found out they are basically an exact copy of ITA's app: http://matrix.itasoftware.com/search.htm.
1) The form at the beginning is much more confusing. Creating a search with Hipmunk is much less complicated. 2) Flights are ordered by price, whereas Hipmunk orders them by "agony", which in my experience, seems to be pretty accurate. 3) Doesn't default to time bar mode, like Hipmunk does.