After having read many reviews including dirt and other issues with these refurbished units, I was pleasantly surprised when this machine arrived in almost pristine condition. The inside of the case had no dirt, dust, or anything out of the horror stories of other reviewers.I installed an application that reports the state of the SSD, and was happy to see 100%.  The software reports 9 "power on hours", with almost 700gb of NAND writes.  That seems high for a 240GB disk, but that's after the OS load and several rounds of updates.The network port is a little bit finicky, periodically losing the network connection. It would be a shame if that is the machine's Achille's heel.  I have not tested all of the USB ports, but I've run some of the software that I'll be using and the performance is great for the price.All that I really expected was to be able to browse the web, watch Netflix, and get some light work done.  For $280 and change this machine exceeds my expectations even with an older i5 processor without hyperthreading.Amazon seems to mix and match reviews from different companies, so I'll say that this computer was refurbished by AST if you're comparing sellers.