How good is the WPS Office Android app

There are a lot of office apps on the Play Store that look great in screenshots and fall apart the moment you try to do anything serious with them.

My use case is a mix of reviewing documents and spreadsheets on the go and occasionally making edits that need to look right when opened back on a desktop. Nothing too extreme but more than just basic text editing, things like formatted documents, spreadsheets with formulas, and the odd presentation.

A few things I'm specifically curious about. How responsive and stable is the app on mid range Android hardware? How capable is the editing experience on a phone screen? And how well do files sync and transfer between the Android app and the desktop version without formatting breaking somewhere along the way?

I’m going for the free plan.