I have not had any major problems with it. The idea of making things easier for mobile users is great. I think this may be something that i install on every website by default.

I noticed when using this plug-in that a gap appears at the footer when this plug-in is activated. It looks like the search box is being pushed back there by default. There my be another suggestion, but it seems a quick fix is to add this CSS to the website:
—
#full-screen-search{
display: none;
}

#full-screen-search.open{
display: block;
}

—

Make sure your search form has the role search, and there really shouldn’t be any problems with it.

🙂