There's a moment early in every Barcelona trip where you realise the city is bigger than you thought. The Gaudí buildings are spread out, the neighbourhoods feel endless, and figuring out where to start can be genuinely overwhelming. The hop on hop off bus is the answer to that specific problem and a very convenient solution for most travelers.
It won't replace actually going inside the Sagrada Família or spending a proper afternoon in Park Güell. But as a way of getting your bearings, understanding the layout of the city, and deciding where you actually want to spend your time? It's hard to beat.
