Well, since I started this thread, I can confirm it started about broken spring posts!
And I am one who complained about the roughness of the Nitecore i4 I had and that is why I went with the VP4 in the first place. My i4 is now back in service, roughness and all. Yes, I really liked the detailed screens of the Xtar, but longevity (or lack thereof), and lack of support make it hard to go with another one. I'm not an Efest battery fan, but tried one of their chargers. Only charging at .68a or 2.0a seems unreasonable to me and I understand other models are more flexible. Being "old school", I like to touch and feel new item purchases and when presented the opportunity to get an 8 bay charger that would charge 4 batteries at 1.0a at the same time, figured it was a reasonable offset to the additional information. And I can manage OK even if 4 springs or spring anchors fail.