The seller has been quite helpful so far.  I'm having some problems but I'm hopeful that I can get resolution.  So far so good.  Will update once I hear back from the seller again.UPDATEOkay so it's taken me a while to finish this but here's what happened. I asked the seller if I could use 2 x 16GB RAM for the memory. I was told yes. The truth is that you cannot. You need to use 4 x 8GB RAM. Also I didn't see any USB 3.0 ports and was told they were there. They just didn't use the standard blue port for USB 3.0. I checked them and that was true. They were there. I have no idea why they wouldn't use the right color port. Overall it works but it's still clunky. As mentioned in other reviews it doesn't seem that the person refurbishing the computers knew what they were doing or just didn't care about the details. I'm sure if I had the time to go back and fix other hardware and software issues it would do much better. I'm already out the money for the 2 x 16GB RAM. I've wasted enough on this machine.