I am a size 34 DDD-E, want to do aerobic exercise but don't want damage and pain from that horrible boob bounce. I have tried many of the recommended bras for large breasts but none reduced the bounce enough for me.  I have not wanted to try the Enell because it is just not very attractive and looks so uncomfortable, but out of desperation I did.  I watched the video on the Enell website intructing how to put the thing on, and I fully recommend it, if I had not, I probably would have tossed it into the reject pile.  This really should be called a support vest not bra, it comes down much lower on the ribcage and has many hook and eyes up the front.  So upon finally getting it on I did feel like it was too small, it felt like my whole front was compressed too tightly, but I did have full range of movement with my arms so I felt like I should give it a try.  First thing I did was stand in front of the mirror and jump and tried to bounce and I am happy to say that there was nearly no movement at all!  after my first workout including jumping jacks, running, etc I am sold.  After the first time wearing it, I did not feel like it compressed me too much and I did not have any problem breathing in it.  I fully recommend this bra for any woman with large breasts.