Developing web site on Wix was quite interesting and fun. Specially the capability of creating multiple sites under one account makes it very easy for setting up mulitple environments: one for debugging, one for testing, one for production, ...etc.
However, the biggest problem we have with Wix, which forced us to stop further investing time/effort in Wix is, the lack of proper export/import function to backup the whole web site (including database).
Because of the multiple environments, the porting of codes from debugging to testing to production becomes very very labour intensive and error prone. We already have a few bad experience which when accidentally made a mistake and updated incorrect data to the wrong database, caused major issue and took a very long time to rebuild the whole site. (Plus, can't rename/delete any databse?!?!)
Please provide proper full web site export/import capability (including database) if Wix wants to attract more professional/corporate customers.
It's ok to restrict to using the same template during export/import, but lacking export/import capability is really a show stopper.