Buying a bespoke build PC from Box was easy. All the compatible components were presented at each stage of the build selection process. I was impressed that Box recognised and supported customers who wanted to instal their own internal hard drive storage. I wanted to transfer two hard drives from my old PC. When I selected this option, the Box engineers attached SATA and power cables ready to me to plug in my HDD's. Box kept me informed on progress during the build and about delivery. My PC was delivered a day earlier than originally estimated. Great service Box! I would recommend you to anyone wanting to custom build a PC.