How I Met Your Mother series finale The series finale of "How I Met Your Mother" left fans with mixed reactions. What did you think of "Last Forever"? Photo: How I Met Your Mother/CBS

WARNING: SPOILERS AHEAD! Do NOT continue reading unless you watched the series finale of "HIMYM."

The series finale of “How I Met Your Mother” has gotten conflicting reviews since its last episode, "Last Forever," aired on Monday. While some fans believe Carter Bays and Craig Thomas gave the nine season-long CBS sitcom the ending it deserved, others were completely devastated when “HIMYM” killed off the Mother, leaving Ted and Robin to finally keep their “40 and unmarried” promise.

And while we loved hearing fans debate over the comedy that stole our hearts in 2005, we’re curious to find out what the cast and crew thought of the series finale. We thought Thomas said it best when he reached out to his very opinionated Twitter followers the night “Last Forever” aired.

"We wrote a comedy with dramatic elements till the very end. Thanks for taking that ride with us. #HIMYM," the co-creator tweeted. "We did a finale about life's twists and turns, and that is not always what happens...but THANKS! Seriously - no matter what you thought of tonight, THANK were with us. We love you."

A majority of the cast thought the series finale of “HIMYM” ended exactly the way it should have — especially because the blue French horn scene was how the creators originally envisioned the show to end when they began writing the script nearly a decade ago.

"I am very happy how it all ties up," Cobie Smulders told Us Weekly. "The coolest thing is that there’s scenes within this episode that we shot during the pilot of our show nine years ago. It’s amazing that we’ve been able to come full circle. And also, we get to jump into the future – we get to 20 years in the future to see where these characters end up."

Neil Patrick Harris and Alyson Hannigan expressed similar sentiments regarding the ending of “How I Met Your Mother,” both sharing their positive feedback on social media.

However, unlike his castmates, Josh Radnor had some critiques of the comedy he’s been starring in for nine seasons. Although Radnor had previously said he was content with how the show ended, he confessed to E! News that he was rather surprised when Bays and Thomas explained they were sticking to the finale they wrote back in 2005.

"I didn't know if they would actually want to come back to it and do that, especially after Cristin [Milioti], because she was so wonderful and the fans seemed to really take to her. So I asked them, 'Are you guys still doing that?' And they said yeah."

Radnor explained the creators left clues within the series to “soften” the blow for the viewers. But the amount of fans who were blindsided by Ted and Robin’s reunion was pretty significant. Even Radnor felt empathy for viewers who were tricked by the misleading title of the show.

"I thought the title of the show was always a bit of a fakeout. It was more of a hook to hang the thing on. Really it was more about these are the crazy adventures and these are the lessons I had to learn before I met your mother,” Radnor admitted. "Part of the DNA of the show is they lead you one way and then they pull you back. You think you're watching one thing in an episode and then it turns out you're watching something completely different. I think that the twists in the finale were in keeping with that."

Did you like the series finale twist of “How I Met Your Mother”? Let us know what you think by taking the poll below.