Beside from BJJ I train Muay Thai and MMA as well and never really understood what the thrill about Combat Jiu Jitsu is. I was using it once with a friend, to prepare her for her first competition in terms of increased stress, pressure and randomness. But I think I'd prefer light MMA sparring over slapping. Personally also because I can acknowledge a good strike, but someone continuously slapping me would annoy the s*** out of me and would probably irritate me way more than regular strikes