VS, along with all the other main carriers are piling this equipment into a/c as fast as they can. Just bear in mind that all suppliers are experiencing reliability problems with this technology.
When it's running - everyone is happy. We have heard some horror stories in this forum about systems not working or failing halfway through the flight. On one trip of mine last year, it took them an hour to get the system to operate and some folks were rather tetchy about it. I was listening to my Walkman and reading a magazine, so I did not mind. If travelling with small people, always have additional distraction material to hand!