Does GSA SER Worth Buying in 2017?

Hello Friends,

I am researching this tool for 3-5 days.
Sometimes, it makes me crazy. I am interested.
But other times, I think this is not worth to buy in this SEO era. Google is ready to penalize me.

I am perplexed. Being confused.

Anyone out there who can give me any explanation why should I cost $600+ to buy this tool with others and why not? What's the business area other than mine?

Please help me to figure out. I have to go a decision. Either I will buy or not.