These are acceptable places for Restylane, but it is imperative your injector be experienced in this area: a board certified dermatologist or plastic surgeon. Injections between the eyes (glabellar) should be done slowly, and fairl superficially. Probably the most devestating complication, tissue necrosis ( death) can emanate from this area and in cases destroy half the face. I have known of two cases where this happened ( in so-called medi-spas).
Make sure your physician has hyaluronidase and nitro paste in case this happens.
Injections into the glabellar help quite a bit, but a fair amount of the material does leak out since the pores tend to be large in this area. Injections into the forehead lines are not as effective and do not last terribly long due to the strength of the frontalis muscle.
As you insinusate in your question, Botox is a far better choice in this area.
