John Mueller is a Senior Webmaster and Trends Analyst at Google since 2007.
Unlike many bloggers out there who benefit from having controversial statements about WIX because it serves any bloggers agenda and gets them traffic John Mueller has no agenda and speaks the truth:
WIX websites work fine in search. There are a lot of different setups for new websites. I wouldn't focus too much on a single provider, but rather think about the bigger picture: which will make it easiest for you to maintain your site (adding / changing content)? If you're getting help from others for your site, is there one that they have experience in, which might make it easier / cheaper? Which one offers the features that you think you'll need in the mid-term? There are probably a few options that could work for you, so maybe it makes sense to just try some of them out and see which one works best for you -- websites are websites for Google :).
And that is that!