How well does WPS Office handle Excel formulas and spreadsheet compatibility?

Seriously considering making the switch from Microsoft Excel to WPS Office Spreadsheets but before I commit I want to make sure the formula support is actually up to scratch. Excel is where I do most of my heavy lifting so this is the one area I can't afford to have fall apart.

Specifically curious about a few things. How well does WPS Spreadsheets handle complex formulas? Are there any common Excel functions that WPS simply doesn't support or handles differently enough to break existing spreadsheets?

The other big concern is compatibility. If I open an existing Excel file with complex formulas and formatting in WPS Office, how reliably does everything come through intact?