I've played on these tables. It was ok. It makes life a lot easier in the correct situations. I played on these tables on a cruise, so you can imagine that like half the table payed little to no attention to the action going on at the table so I'm happy they had them otherwise I can imagine the amount of out of position folds and other such inconveniences at the table.
The only big problem I had with them was that we found a couple people cheating at the table. People were able to look at others' cards fairly easily unless you made it a point to like totally cover up the "cards" on your screen when you looked at them. We even had another incident where a man's wife was looking at someone else's cards and telling the husband. Not that it really mattered because 95% of the players that I encountered there were pitiful.
I think these belong in these types of places, but they do not belong in big casinos