100% solid copy of everything, including callsigns. This is a small irk; I find lately and pretty often the station I'm in contact with sends, "R R" and then gets my callsign wrong, even though I sent it repeatedly. And then "R R R" and still gets it wrong. How can it be "solid copy" if you can't even get the call correctly? Recommendation: One "R" is more than sufficient, and don't send it unless you're really sure you got everything from callsigns to details. I send "R" sometimes, but only to confirm every single dit was copied fine. Otherwise, it's best not to use this.