I really like these knickers. They're the most attractive of the Modibodi period panties I have, and very comfortable to wear overnight. I got my normal size and they were a perfect fit size-wise. I didn't give them 5 stars as wish they were a tad tighter around the legs.... although they didn't leak on to clothing or my bed overnight, some blood did get onto the seams of the gusset, where they aren't tight to the skin on the seams. They don't feel quite as secure as the classic full briefs, but much better than the seam-free briefs, and I love them! The fabric is so soft and lovely. The most comfortable of the three styles I own from this site.
I don't know why I don't have the option to review the size I actually got (UK24 / 5XL) but in terms of plus sizes, the sizing is really good. You could size down if you like a tighter waistband (I prefer extreme comfort!) but you certainly wouldn't need to size up ;)