Ive recently started re-training BJJ with the people over at Quantum for the past month to help supplement my other martial arts habits. From what Ive seen so far, both instructors Nelson and Eduardo know their discipline very well and are running a great academy. Looking forward to advancing my knowledge with them and putting in that hard training time.*Edit - 2/25/2020 - Quantum moved to Cos Cob, CT and is located at The Greenwich Water Club locates at 49 River Rd.

I send my two sons to the academy to learn humility and confidence. All schools or academies take on the personality of their leadership and I found what I was looking for here at Quantum. Prof. Eduardo Barbosa is an incredibly humble man with the heart of a Lion. His technical skills are amazing and I see how he helps to methodically progress both of my sons knowledge and love for the martial art. Plus, I love Feijoada!

What an awesome gym u can’t beat the trainers! There skills and knowledge are incredible great for kids definitely worth checking it out

Knowledgeable instructors, clean and friendly environment. My kids truly enjoying going there.

Finally, we found the right Jiu-Jitsu academy for our 2 boys. Having experienced a couple of other places, I can honestly say that you will get top-notch instructors who practice the values and visions of Jiu-Jitsu.Novice or not, I recommend this place to all.

The main BJJ instructor is a high level competitor!! OSS !!

Great team!!

Great place to stay in shape, learn bjj, great professionals, excellent location Professor Eduardo Barbosa very enthusiastic and a super professional in gentle art

Excellent location, great professionals, Mestre Eduardo excellent teacher super recommend