I definitely quadraboob in my 75j lately so I purchased this one from another member. It is much longer in the band than my j. The cups are wider and taller, particularly at the wing, but not as much as the one I originally bought and returned. It isn't uncomfortable.
So, this one didn't fit either, but it's closer to the right size than the 70J. The bra is well made, the straps are a firm elastic and fully adjustable, the wing material feels substantial and the cups are nice and soft on the inside.
The fit seemed the most "off" around the centre front. I couldn't find a way of positioning the gore to stop the cups overlapping in an uneven-looking looking way. I felt like I was falling into the centre ...(and downwards) so I ended up with gaps at the top of the cups just either side of the gore. I don't know if this means the gore is the wrong height for me or what, it's not a fit problem I've had before. The cups seem quite long and narrow in general. For some reason I have found the Comexim bras to be the least forgiving of difference in size of any brand I've tried- I felt very noticeably uneven in this and the Mint especially.
One other thing I noticed was the vertical seams along the front of the cup- they seemed to angle in slightly a couple of inches up from the wire and again where the horizontal seam joined the vertical seam, creating a flat section along the front which jutted out a bit under clothes. It may well have softened up and become less noticeable with washing though.
I bought this, as I was quadding in my 75J model of this; however, this one is about a half to a full cup size big. The band feels between a 32 and 34, which is perfect for me. I just can't fill in the cups all the way, so there's some gaping at the top of the cup.