I have no Scent Lock hunting gear at all so I can't speak for or against it. But I can share about 3 close encounters with Deer last year which may give some insight that will help. My first close up encounter with a Buck was at 12 yards,eyeball to eyeball. The wind was in my favor what little there was and the morning thermals had not kicked in yet due to the coldness not to mention the heavy frost on the ground December the 5th of last year.The Buck was looking right at me the whole time and never bolted off. Why? How could I get so close to an animal with such a great sense of smell? I had no Scent Lock on at all but I had the weather in my favor,wind ,thermals,frost etc. Also I do use scent cover and scent eliminator products. I wash my hunting cloths everytime I come out of the field,I take a shower before going out,I leave all my hunting cloths outside along with my rubber boots.I use every product I can and when at my hunting spot I spray the cover scent eliminator on me and my gear. The most important thing in all of this is the Wind then the scent issue is a close second.The second Buck and Doe encounter 1/2 an hour later was at the same distance.Six Does and the Buck I took once again came in upwind of me and they came right up to me and never sensed I was there,the Buck died that hour. Once again I credit the Wind and decent scent control for leting me get so close on the ground,I was not in a tree stand but on the ground between 2 brush piles with logs on both sides. The 3rd. encounter was with a Buck only 10 yards away on January the 2nd. and He was down wind of me on the coldest day of my hunting season. He scented me but not until he was at 10 yards distance and once again I was on the ground. I believe in scent control products because I got real close 3 times, but having the wind is the key in all this to me. Sorry it took so long to explain but I hope my encounters shed some light on the issue.