Wizz Air are on the rocks and should be avoided unless you really like to gamble. There have been a few flights cancelled at very last minute - one group I know were halfway through the ~10 of them checking in when they learned their flight was cancelled (on their way to a wedding). There was also a famous case this summer of a flight being cancelled after everyone had already boarded and the plane was on the runway.

Don't bother, even if your ticket is 50 EUR cheaper it's not worth the risk.