Correct, but if it’d be buggy as your description, then it wouldn’t be running on these 10,000+ sites either. That’s why it’s important to take a look at the actual site and see what could be causing the problems.
Apparently you don’t know it, but this plugin uses the very same Google Translation widget. Which means, on the front end, the code populated is very similar from plugin to plugin.
Again, if you’d like to give it a second chance, contact us and we’ll happily assist you.
Regards