2E/use? Wow! Ours cost 6E for a year´s subscription (use it as much as you like; it´s open during the times the metro runs), although after the initial offer it´s gone up to 26E, I think. Still not bad when a single metro ticket costs around 1.20E (approx.). It works well because the centre of Bcn is quite small, as cities go, (although they could have more bike lanes - I think Holland´s far ahead on that aspect!), whereas I can´t imagine how it´ll work in London where they have plans to install it soon…