Having had a Swiss Pass that expired just before the end of my recent trip to Switzerland, I appreciate the full value of the Pass.

At under CHF30 a day, is represents a massive discount, unless you travel very minimal distances. Some of the savings I benefitted from included:

Museum admissions - Free entry
Cable cars and funicular railways (Some with only 50% saving, others free)
Trains, Trams and buses - Free travel almost everywhere.

Without the Swiss Pass, I would have been severely restricted in my trips, or had to spend a fortune.

It also provides the great freedom, that you can just jump on a train, bus or tram to visit somewhere if the mood takes you.