I think the best panty is the one you sew yourself.
I plan to buy a remote bullet (bliss or lelo) and sew it into a panty to make sure that it fits for my lady.
I really have doubts that theese panties apply enough force to keep everything at the right place. Other fabrics needed.
The design of the Club Vibe 2.Oh looks like it could stay at the right position. Maybe.