Here are some reviews of Business Class products on other carriers:
BA:
https://onemileatatime.com/guides/br...s-club-suites/
AA (bring rolled out):
https://news.aa.com/news/news-detail...9/default.aspx
B6:
https://onemileatatime.com/reviews/jetblue-mint-studio/
Note that if you were to fly AA or BA, you could credit your flights to whichever oneworld frequent-flyer program proved most beneficial for you.