The secs_running is helpful for really long running queries, but it would be nice if you could see how many milliseconds an operation took/has taken (currently 999 ms == 0 seconds).

{
"opid" : 1813818233,
"active" : true,
"lockType" : "write",
"waitingForLock" : false,
"secs_running" : 0,
"op" : "update",
"ns" : "something.hosts",
"query" :

{ "_id" : "b4e71929015b7627b921c166569b6228" }

,
"client" : "11.202.96.207:33107",
"desc" : "conn"
},