The Westminster Labs cable arrived tonight (Tuesday) about 6:30 PM, which was perfect since Tuesday and Friday night are music and beer nights.   Since this power cable is so short compared to the stock X1 power cable I had to move the X1 to the center of the rack, and put the power supply on the left side.   Naturally, this turned into a major exercise as I tried to maneuver the Shunyata power cord from the right side of the rack to the left.   Of course while doing this I managed to knock the power cord off of another piece of gear.    Finally I got the gear rearranged and all the power cords installed and turned the gear back on.   There were no flames or smoke so this exercise was successful.    
Now that I have about 30 minutes of listening time on it I can say there is an obvious improvement in sound quality.   The sound has a bit more presence and punch to it.  Not that the previous sound was bad, but this is a bit clearer.  I will let the cable get acclimated to its new home, and give another review Friday night.   However, I am satisfied with my first audio purchase in 2-3 years.
The cable itself appears to be a solid, well made, piece of gear, and I am more than happy with this purchase.