I didn’t bother with it, I have an Electroverse card which came with £10 credit, not sure if they still do though. Apart from 1 charge while I was waiting for my home charger cable to arrive I’ve not charged away from home, the price puts me off!! 🙂
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!