Actually, my wife and I were in the Berner Oberland a week ago. We stayed in Lauterbrunnen for two nights and Mürren for 4 nights. We came by train from Innsbruck and arrived in Lauterbrunnen around 7:30 pm, and used the first full day to go up to Wengan and hike around up there. We also hiked up to Staubach Falls. The next morning we went up to Trümmelbach Falls before heading up to Mürren. After that we never went back to the valley except after going Para Gliding.
We went back into Lauterbrunnen (had to claim my free beer after Para Gliding) we took the Gondola up to Grütschalp. The Gondola operator challenged my use of the Swiss Pass, saying that I was not eligible for a free ride, but merely a half price ride. I don't know if I convinced him that the pass was good for lifts for the one month duration of the pass, but he let us go ahead for free.
Switzerland IS expensive, but, in my opinion, not overly so. The scenery is absolutely stunning, and Swiss Hospitality at hotels and restaurants is without peer. It's an expensive country, but I never felt ripped off.