Shoulda hit google before I opened my mouth. Looked at their products, look pretty good. They extend the teeth, just like proper design dictates. I also ascertained what I believe is the correct answer. They state that their product is offset 19mm toward the bike, what I would call negative offset.

I think he is asking how much the sprocket is dished, ie the offset from chain centerline to mounting boss face. I dunno the answer, just think I understand the question. Never ran one, being a machinist I recognised early that I could improve the design over stock and have always made my own, from titanium for the challenge and longevity. Mine always run dished, I center the cranks, then calculate optimal chainline then chuck a biilet on the lathe and start carving. 2 or 3 days later Ive got the perfect sprocket..... Why spend 50 bucks for a store made aluminum part when you can spend a few hundred and days making the perfect titanium one?

idk what u mean by offset, like the teeth alternate? of course. the lekkies grip the chain better than stock, if you have chain jumping issues. but it depends a bit on your rear cassette gear ratios with the front chain ring... and what kind of terrain are you biking. steepish hilly or flatter commuting? example: 10 speed cassette, 11-36t. with a 42t lekkie chainring this is the sweet spot ratio for steep climbing as well as good top speed. If i wanted even more low end torque for very steep, or like many mtbs with an 11 speed will have a 42t big rear cog. 42t in back, 42t in front = 1:1 ratio = great for insane hill climbing or non ebike climbing... if you had a 36t rear and 52t front, its about the opposite, bad for climbing, good for flat higher speed commuting.