A truly amazing attraction. The tickets would be worth it at double the price to be honest. The café is very reasonably priced too considering they have a captive market there.
My wife and I saw marmuts (came within a couple of metres of us), an ibex(surprised us by sneaking up on us, got to within a metre of us on the path before we turned round and saw it), deer, chamois and other wildlife too.
Thoroughly recommended!