Yeah, it's a great system for the most part (with video replay).... when it is actually turned on.
It is the first year Wimbledon is using electronic line calling instead of line judges.
www.nytimes.com
I was at a small ATP Challenger Tour 100 yesterday and it wasn't turned off once and worked just fine.
Also seemed a shame they decided to replay the point that Pavlyuchenkova clearly won too.
Interesting to read how the US and Australian Opens use video replay and Wimbledon does not. Wasn't aware of that, perhaps they should. No complaints there with 2+ years in use at those tourneys.
Pavlyuchenkova also called for video replay to be added to the ELC protocol. It is used at the U.S. Open and Australian Open, but not at Wimbledon.
One suggestion that ESPN's Chris Fowler also recommended during the tournament and before today's incident would be an added electronic board where calls such as "OUT" could be shown in addition to vocal call in case it is not heard over the crowd. Some place where both players could see it too.