The code is a complete mess, you're loading 100's of fonts and 1000's of css declarations inline, most of which are unnecessary. 80% of your the homepage's load time is due to script requests which is completely unnecessary on such a basic site... BUT I guess thats what you get when you "build" a site with WIX.
Did you look at the sites of similar companies before you started? A quick google search returns this site, and this one. Can you see where I'm coming from with this?... Visually the site is dated and doesn't appear to have had any thought, consideration or research put into it.
Sorry if this is harsh, but you did ask for feedback.
I have a feeling this means they disagree with my feeback, will ignore it completely and continue looking for someone who's going to tell them how fantastic it is and how they should build websites for a living.