More of a comment than question for those headed to Murren for hiking. The trail was beautiful with amazing views as described in the forum and Rick's book. That said, the trail is not particularly well marked and there was clearly a detour around the gondola construction site. We had to ask several people on the trail directions to confirm we were going the proper way. I would also give a stark warning to those not in reasonably good shape/don't hike normally or used to regular vigorous exercise. This hike, the Mountain View Hike, and even the Murren to Gimmelwald walk were steep and rigorous.
Murren to Gimmelwald. Rick describes it as an easy 30 minute walk. It is more like an hour with a significant decline the entire way. If you have any knee issues you may want to consider just taking the gondola there and back.
North Face. Described above. Large inclines and declines. You must have proper hiking shoes. We wish we also had purchased or rented walking sticks.
Mountain View Hike. After taking the funicular from Murren, this is a very pleasant hike for most of the trail. Rick only gives it one star, but is has the same general vibe and views as North Face so consider it a three star. The last kilometer or so is extremely steep downhill (or uphill if you start right from the train) with often difficult terrain. You must wear hiking boots and I can not recommend poles enough. Many people were winded and exhausted on the way "up" that we passed.
All this to say, please do not attempt these trails unless you have physically prepared to navigate the steep long winding terrain involved. The views are breathtaking, but all are physically challenging. My wife and I exercise daily with cardio and weights and we were quite exhausted after all of them.
Hope this is helpful and have a wonderful trip!!