Jungfrau Pass

Off to Interlaken in June. Wondering if it's worth purchasing the six day Jungfrau Pass, we are aware the the trains/cable cars are very expensive and that we will need to pay extra to go up the Jungfrau itself but I wonder if it will all feel rather frantic having to use the pass on six consectutive days to get our moneys worth out of it, or will it still be worthwhile even if we have a lazy day off in that period? Would really appreciate some advice on this please.