Excellent

Allows you to select from a massive list of languages. Stick a widget near the top of the sidebar and it’s right there, ready to translate everything you can see on your page into another language. Thanks for this!

Native visual customization isn’t bad. I had one problem with it appearing on top of a search box dropdown which was easily fixed with some CSS:

/* Force the search form above everything else */
.is-search-form,
.menu-item-search,
.menu-item-search .is-search-form {
    position: relative;
    z-index: 9999 !important;
}

/* Push the GTranslate widget down in stacking order to stop it appearing on top of the search box */
#gtranslate-2,
#gtranslate-2 .gtranslate_wrapper {
    position: relative;
    z-index: 1 !important;
}