I find it much more convenient and easier all round to take my car and park at the airport when going on trips. Once you register via the online portal all your details are there, just enter the date and payment info and you are ready. Turn up in the morning and go via barrier as normal. When you return simply get in your car, put the ticket into the barrier and you are son your way - how simple is that! On my last trip I left my ticket in my hotel room in America, gave the guy my booking reference via the intercom at the barrier and in nor time was I on my way. And it costs less than a taxi to and from the airport for me. Definitely will recommend and use the service again