If you are a heavy spreadsheet creator, using special characters, then you will find WPS spreadsheets quite quirky\buggy.
If you just need WPS for basic activities, then it is OK and should meet your needs.
WPS at 50 % off Lifetime license is not a bad deal at $39.95; it sure beats $400 for Microsoft Office 2016 Professional...
In my experience, WPS is the most compatible of the alternative office suites with Microsoft Office.
That being said, if you open a highly customized document, spreadsheet, etc - then you might still have to fix formatting that is not rendered the same as the original document.
WPS Free met my needs for a very long time - only recently did I have the need to use some special characters in a spreadsheet.
However, I've only used WPS on Windows.
The best option is to trial each one, and then decide.