I’ve used Dynafits since around the turn of the century. I would note that Doug Coombs also used to ski Dynafits with wide skis. You need to check that the 100mm ski crampons are available where you are for your wide skis. The brakes are the worst part although some people do get them to work but most folk end up touring with leashes.
Dynafits are a bit of a religion in the Grenoble (Fr) touring scene. I tend to be more pragmatic and also have Fritschis IIs and some Evos (lightweight binding similar to the Fritschi but can take mountaineering boots easily). I’ve also used Naxos and Silvretta Pures over the last couple of years on loan skis. The Naxo is a nice, comfortable binding to tour with but the dual pivot has always worried me. The Silvretta Pure works well and has a well placed pivot point behind the toe.
The Dynafits are not indestructible as some of the zealots will have you believe. All the plastic stuff can break, especially in the cold. The toe pieces are prone to icing. Still hard to argue against 700 grammes as opposed to 2000+ for Fritchis. They also have a DIN 12 rated binding now for heavier skiers. The main problem again with wider skis would be the leverage on the toe piece, basically you need to make sure the toe piece is properly locked for traverses.
