This was a really nice read. It's definitely a strong 4 stars but not quite 5 because I had a couple of issues with it (mainly a certain secondary character) and I just didn't fall in love with this.
However, I did really love the couple and I thought Matt and James were good MC's. The friends-to-enemies-to-lovers was awesome and I do quite like those types of stories. Also, the sex was really good in this. It worked for me, as did the romance part of this book, and surprisingly the sci-fi parts. The writing was also a positive for the most part. And I really enjoyed the story overall.