For context: At 53, if I am going to spend money on leisure, I want it to be a relaxing experience. Having to pay a membership fee and then wait until a few weeks before a match in the hope of snagging tickets in a ballot or whatever is really not my idea of relaxation. By then, flight prices and hotel availability become an issue and the whole thing becomes one big stress.
So, for the odd visit each season, Seat Unique has convinced me. And I'm a fella who was anxious about even getting through the turnstile with digital tickets (not to mention having to hold your phone "backwards" to the sensor). So, for those who want an easy life at no great extra cost (the €20 more we paid in total for certainty was more than made up with flights booked early for €19.99), Seat Unique is highly recommended.