Question about the finale...

So I love the show and can't wait to see Matt reprise his role on Arrow this year, but I was wondering if it's worth finishing the series finale of Constantine. I watched the episodes as they aired, but I couldn't bring myself to watch what turned out to be the series finale in case it ended with a cliffhanger, and no hope to see how things turn out. Is it safe to watch, or should I stray away?

Cheers