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Like the 400 odd other 1 star reviews, W3 Cache broke my website. Even after it was disabled it still caused huge issues and hours of downtime because it affects changes to core WordPress files like functions.php and config.php. Deleting these off the server and installing backups WILLL NOT WORK.
Our web hosts have had loads of trouble with people that have installed this dangerous plugin and knew right away what the problem was.
***avoid at all costs****