Just a heads up that if you are interested in a Swiss Travel Pass for the early summer, Rail Europe is starting a deal for 20% off the STP if you purchase an ePass. Travel must be completed by June 30. It's saving my husband and me a little over $100. We used the STP last year and really liked the ease of hopping on and off trains/boats/buses plus the entries to museums and things.
You won't see that deal mentioned on our main Swiss pass page but the coupon code info will be there when you click through to purchase the STP, or check the See What's on Sale link.
When you buy an e-Pass version of the consecutive day pass, be prepared with passport numbers and birthdates for each traveler and your exact dates for pre-validating the pass.