I have just received a notice that they now offer any upgraded bundled service which includes unlimited wifi on 36 airlines and worldwide hotspot access, unlimited check ins and discounted lounge access. Costs 10 EUR per month.

The wifi is the only thing that could potentially sell me on the service. However, many airlines have different tiers of speeds. I would not want unlimited data on the lower speeds. The list of airlines includes a lot of big players (American, Lufthansa, KLM, Air France, Etihad, ANA, China Airlines, Singapore, Virgin Atlantic, amongst others).

However, I will give this a pass without further details, which do not seem to be available within the app.