The hardware is great but the upgrade to Windows 8.1 from Windows 7 was not pretty.  One machine upgraded fine.  The second machine in the same order would not upgrade.  It required a clean install from the included CD.  I added 4GB of memory to each machine and they still do not seem as fast or responsive as other Intel i5 boxes we have.  While I see Dell as a very reliable brand there is definitely something lacking in the chipset of this model.