Because this series has really surprised me in a positive way, I wanted to write a short review for everyone who isn't sure if they should watch it or not. My answer is a definite YES!
When this series started, like many others, I wasn't sure what to expect from it. I usually only watch BL series and didn't know if this was going to be BL or not. The first episode seemed a little cheesy to me, but luckily I kept watching and as the story advanced I couldn't care less if it was BL or not anymore, because I began to like the story for what it was.

The Shipper has a very well written story. Every episode is exiting, surprising and unpredictable. It plays with your expectations which makes it a lot of fun to watch and never get boring.
The acting, as far as I can judge that, was also superb. I especially liked First's acting, because he managed to believably portray a girl in a boy's body. Fluke's acting also stood out to me, but maybe just because he was so cute in the series. Overall I couldn't name a single actor who didn't do a great job in this!
I would definitely rewatch this series as I want to know how many new things I'll notice now that I know the outcome of the whole story!