In reply to Chris Huntington:
As Jon points out, the Matterhorn is very conditions dependent. I climbed the Schmid route a couple of weeks ago (admittedly in very good, and easy, condition), and the descent down the Hornli felt harder and more serious than the north face... Very different from last year, when I climbed the Hornli twice in near perfect conditions. A good gauge of conditions is where you anticipate donning your crampons - the higher, the better. Last year, it was at the Shoulder, just below the start of the upper fixed ropes. On the way down two weeks ago, it was probably at around 3700m, halfway down from the Solvay. The Zermatt guides were not guiding the Hornli this summer for good reason - it was in winter condition throughout. This makes it a very different proposition from dry conditions, much more serious, especially on the way down.
Those who suggest that 'it's easy', as in low on technicalities, are missing the point. Yes, there are fixed ropes at most of the steepest sections. But the hardest part isn't climbing these - it's maintaining concentration for the entire 1200m descent. It's a long way down! As with many things in the Alps, good mountaineering footwork is what counts, not rock climbing ability.
Good luck!