I tried to purchase the one blade subscription and wish I had never bothered. For days and days they were messaging me because I told them the purchase wouldn't go through because of an 'internal error' they kept on telling me to try again but changing various things and deleting the cache. I really want this product on subscription so I get the blades sent to me regularly so every time I tried I got excited. Despite my best efforts and their repetitive advise to just try again and being let down EVERY TIME i'm just going to give up and buy something different. I first reached out to them on 13th feb after already trying and failing to buy it a few times so have wasted 2 weeks on this! I would suggest that Philips maybe speak with other companies who run successful subscription services and change what they do to something that actually works. It comes to something when you try and buy something and they can't process the order!