Renfe IT infrastructure is a disaster. First of all I spent almost 2 hours to simply book my tickets on their website. Wifi in trains doesn't exist: you need to get sms to use it but neither me nor my family never received any sms. You even can't submit a feedback on the website: after spending 10 minutes to fill endless form with each and every detail (number of document, number of train, number of ticket, date, time, etc) I received an error message like "We can't help you right now please try again later". It's a pity to understand how inefficient they spend their IT budget