It all depends what company you work for if you need a union, ask employees and look online to see past employees' views on the company and the union.

I support unions and where I worked I had no other choice but to join the union. The union offers classes for other jobs in the company so you can get certified in and the job protection is also a nice perk with being in the union where I work. Even though we live in a right to work state, the company still has to go by the guidelines negotiated between the company and the union (depends but its hard to just walk right in a fire you). But it also works against you when it comes to pay, since its a structured pay system. The union are weak in the south, but I rather have someone atleast having my back then no one.