Botox

I would like to know about the effects and cost of Botox. I’ve heard that botulinum toxin is injected to smooth wrinkles and relax muscles, but I’d like to know who it is recommended for and which areas. I understand it is mainly administered to the forehead, eyes, and calves. For the calves, how often should I get injections after the initial relaxation? What are the characteristic changes in the calves? Do they just become smooth? Is it also more comfortable to walk in? What are the advantages of Botox compared to fillers? I’ve heard that while fillers are natural, Botox is artificial; does it have the advantage of being semi-permanent? I would also like to know about the satisfaction regarding cost-effectiveness and the procedure itself. How long does the effect last, and could I know the total cost? I hope the treatment intervals are short, and that the recommended number of sessions is not too high. Please share any positive reviews or treatment experiences.