It's very straight forward, you might find it a bit exposed on one of the short summit snow ridges. You can do a bit of a circuit on the summit aswell ie. if you enter onto the summit from the ridge on the right, you can exit on the left (and then just drop back down onto the well trodden track you'll have just walked up).
I think most people rope up once leaving the pisted snow, but that's your call.
As John says, it's best to acclimatise beforehand, maybe by doing a walk to between 3000m and 3500m before. Saying that, we used it for acclimatisation a few years ago for the bigger Monte Rosa peaks. Most of us already knowing we could go straight to 4000m with little adverse effect. Unfortunately, one new guy was pole-axed for a few days by altitude effects, he's since discovered that he merely has to walk to 3000m by which time he's feeling nauseous. Because it's a fairly short walk (by alpine standards), you'd probably get away with not acclimatising, but you might suffer that afternoon and evening by the time your back down in Zermatt..
I'm also going to that area in September 5th-16th, so maybe we'll cross paths.