In the aggregate, unions are bad. For the members (in skilled professions, IE not fast food) they are generally a benefit.So does this mean unions are good? Naw baba naw, but it's fun to dream the marxist dream and scratch each others back. Giggle giggle huffy giggle.
The best kind are found in Germany, where they work with, not against management. For various reasons of antitrust law, that's illegal here.