I've had mixed results from GR. Having found my maternal grandfather after seven years of searching I input his details, got "hot matches" and, after correspondence and opening my tree (possibly a mistake!), a large chunk of my tree is now added to theirs. We're related but it's distant, we share a common great grandfather

However, very much on the plus side, I posted a query, totally forgot about it, and months later got a message from a lady whose sister had some details for me - an email address was given. The result was a very high brickwall was knocked down - verification is still needed but I now know where to look and have dates to work on

Tim