Definitely the way to go if you don’t want to spend more time painting the minis then playing with them, but still want them to look reasonable. It’s incredible how much even a single dry brush on a base layer brings them to life. Maybe the only caveat is that some miniatures are not designed with painting in mind and don’t have the textures and structures that give the depth. But even then the worst you will get is a not really improved mini and some spent time.