The customisation is easy but if you're out of touch with the current PC world I would definitely recommend checking on the forum if your chosen spec is OK before ordering. I did and I was advised almost everything I had chosen was wrong and given good reasons why. I changed my order to the advised spec and it's been great. The forum is obviously not PCS employees just friendly individuals with vast knowledge they're happy to share. Once the order was placed there was constant information about its progress and it arrived in 7 days despite originally saying it could be 10 to 14. They even added in the cables for me to add two old SATA drives from my old machine with all my documents on. So far it's been flawless and hopefully will continue to be for a good few years to come.