Wine Preservation Systems

I am curious to who uses a preservation system, and their thoughts on it.  What made you go with the one you are using?  Price?  Size?  Ease of use?  The look of it on display, or behind a bar? Have used both Wine Emotion and Cruvinet.  Looking for other options and thoughts.  Something where people can see it at the bar, and ease of use.  As much as I love my Coravin, some people find it hard to use, and for multiple BTG options does not seem to be the best option.  

Thanks in advance for all the wisdom and ideas! Cheers