I bought this cup because I found my other cups couldn't cope with my extremely heavy flow (I'm pre menopause) and this fits the bill perfectly. I waited for two cycles before commenting and I can safely say this cup will see me through the night on heavy days, I still use a pad for back up but that's more out of habit.
However I do find this cup aggravates my cramps, in fact not just this cup but all my cups these days aggravate my cramps, so I think it could have something to do with my perimenopause hormones.
Otherwise this product is well made and easy to clean, I particularly like the sterilising pod and I use for cleaning my other cups too. The cup has a smooth but matt texture.