They're friendly to it, only one other person in my gym uses the lock down and rubber guard. Another is familiar with it and loves the twister side control and truck but thats like 2 out of 30+. Another small portion use the London or William's guard which is a variant of chill dog. So all in all maybe 5 or 6 people really know anything about 10th planet stuff. My teacher likes Eddie but hates submissions 101 guy on youtube. My gym is super oriented towards nogi, we only have 3 gi classes a week and have 11 nogi class if that gives you an idea, they understand and respect clench guards.