It depends on your current TTFB and server. According to the tests we conducted, our FPC extension can save seconds of loading time which may be critical for your visitors and ROI as a result. Read on to see the tests results.
For the Full Page Cache module, there are four available cache storages that will influence the overall cache performance. These are Redis, Database, Server, Memcache and each one of them has its pros and cons. Read the full answer to get more details on them.