If you're a hard-charging sightseer cramming the castle, several towers, museums and a cruise into 2–3 days, the bundled price and skip-some-queues can genuinely save money and decision fatigue. The honest catch: Prague's best things — the bridge, the squares, the gardens, the river scene — are free, so a slow or budget traveller will struggle to 'earn back' the pass. Do the maths against your actual list.