Just before we climbed it in july 2003, large crevasses developed in the middle section of the route. It requires some nice, not to difficult steps. Some ice screws are adviseable. An unsecurred 60 foot ladder has been placed to overcome an overhanging icewall. Add about 30 minutes to 1 hour in your route planning when you have a pre 2003 route description.
A more common place to stay when you want to climb the Weissmies is the Hohsaas hut. It's a private hut, which costs a bit more then the Weissmies hut. The big advantage is that it's closer to the Weissmies so you don't have to walk an hour before you reach the Triffgletscher.
The accomodation is alright. It's a bit small, but there's still room for about 40 persons. Most beds are on the first floor of the cablestation, which is about 20 meter away from bergrestaurant Hohsaas.