This bra is not supportive, at least for my shape. The cups gap at the top, and the gore barely tacks. It's still quite comfortable. I wear it infrequently as a lounge/house bra and for running errands.
The inner mesh lining is soft. As much lace is present, it is not itchy or irritating.
I'm not sure if sizing down to my usual 28FF would make a significant improvement.
Overall this is comfortable, but I find that the support can be a bit better - the material is too stretchy I think for this up size. After walking outside all day, it doesn't feel that comfortable because there's too much bouncing for my liking.