Good is a duration marker and gets rewarded, but it's not a release. Later in training, I don't reward every marker. I use it more as communication, moving to variable rewards after the mark.
It should be said that I don't train competitive OB, and I'm not looking for that flash that the AKC and IPO trainers are looking for.
I train leave it with markers. There is a good video with a guy training in a garage, throwing food on the floor and marking focus back on the handler with a final release to get the food on the floor.
I move to corrections (NePoPo with a prong and e-collar) after the dog gets it. I also use leave it in detection to get the dog to leave a hide and move on to the next search instead of returning to the hide it just found. This helps reinforce the reward. No corrections in the detection training, but I will negative mark a return to the initial hide.
When a dog saves the life of a man, it becomes clear that partnership knows no bounds.
Fama - T.E.D.D. OEF XI-XII (GSD)(RIP)
Marshall - T.E.D.D. OEF XII-XIII (Lab)(SF EDD)
Lucian - Med Alert / Mobility SD (Cane Corso)
Pud - the old man (Pit x Lab)
Hank - DW Dog (Cane Corso)