I recently bought the version of this machine with the i7-5700HQ and two NVidia GeForce 965M's with plans to upgrade to the GeForce GTX 980's through the upgrade path. This machine first and foremost very large and attracts attention, but did not stop me from using this within the airport or within my house for both travel and server work. While on a plane, the tray on the airplane was consumed, yet was enough to play a game of Plants vs Zombies or watch Dr. Who / The Big Bang Theory on a 4 hour flight without any power with the NVidia GPU's turned off.
For managing virtual machines through VMware vSphere and running VM's on VMware Workstation, this machine can handle a small network while multitasking on a larger infrastructure. As well as that, this machine can handle letting a several VMs (Cisco CSR 1000v, CentOS, ESXi, Windows 2012 R2) run in the background, doing upgrades or running deduplicaton while I play few levels on Warframe or play Watchdogs or Metro Redux.
The mechanical keyboard does require me to push the machine back in order to type, but feels better than working on my wife's Alienware 14 or my retired Fujitsu T732's keyboards. The mousepad works for management and general use, but feels unusable for gaming.
Overall, the machine works for it's intended purpose of multi-purpose usage that is surprisingly portable with the bag that was provided. The bag was used as a carry on with 3 pairs of pants and 4 dress shirts, along with my Logitech mouse, mousepad, power supply, and dress shoes. The only thing I would suggest for those who travel with this is to get a portable desk.