As someone who regularly uses a Surface Pro 3 without the keyboard attached (it's become my default couch computer), Edge is the only Windows browser I've found that's touch-friendly, so it remains the main browser I use on that machine.
That's fair - I just find it's horrendously unstable (often hanging or crashing) with only a few (under 8, generally) tabs open (also on an SP3), whereas Chrome / FF will handle up to hundreds with no issues.
