I own a Nitecore I4, LUC V2 and an Xtar MC1.
All are good chargers IMHO but I actually really like the LUC (go figure as I generally dislike Efest).
The Nitecore feels cheap with crunchy sliders but functions fine, The MC1 is bare bones but is a fantastic charger. Xtar makes a great product.
The LUC has nice sliders, functions flawlessly and charges faithfully but it is expensive when compared to the Xtar. I would rather have a new Xtar VP2 than buy another LUC for the $$ difference.