The one blot on the otherwise happy story of electric car ownership has been Polar/Chargemaster. They have a model where you can subscribe to their service, in which case you get an RFID card, or you can pay as you go using their app. The trouble is, their app is absolutely terrible. I can't think of a single time I've used it where it hasn't taken about 20 minutes to get it to load the charge points close to me and then get the one I want to use activated. We planned a trip to London a couple of weeks ago and parked where they had a fast charger only to discover that PAYG customers didn't have the ability to use it, something that it didn't say anywhere in the app! It's got to the point where I was just planning a trip to my parents with an extra charge because of the cold weather and I filtered out their chargers - they might be more conveniently placed sometimes but that's no good if they don't work properly! Fortunately, the ecotricity chargers have been much more reliable and easy to use, even when they switched over to using an app rather than an RFID card but still, it's kind of a pain. I guess they basically don't care about PAYG customers or possibly even think that if they make that service rubbish then people will be more likely to upgrade.
Overall, I would definitely recommend the electric car experience, but if you're thinking of getting one, just make sure you won't be relying on Polar /Chargemaster for any key journeys!