I have never gave wordpress plugin 1 star (and i have created abour 400 wordpress webs during last 6 years), but i simply hate this one. It's functions are great, but i have always ended sooner or later with some critical failure and this plugin is almost impossible to delete. E.g. now i cannot access wp-admin because of
W3 Total Cache Error: some files appear to be missing or out of place. Please re-install plugin or remove /var/www/projects/zdrojak/htdocs/public/wp-content/advanced-cache.php.
I have deleted WP database completely (new project, dont bother), i have deleted wp-content and reinstalled WP and the bug is still there. I guess there are some symlinks etc. i cannot see on external hosting.
I can simply flush everything from this hosting and install again, but if it would be a living project, i would probably go and kill the authors.
And this is not the first time, several such errors sometimes appears. This is the best cache plugin if it works, but if not, you will loose your hair trying to fix it.