with Eversync should I turn FF and Chrome Syncs off?

I'm new to Eversync, and hesitant to turn off Chrome's Sync and Firefox's Sync. (Particularly because I've heard Eversync sometimes has issues.)

Is the risk of conflicts from not turning the browser syncs off worse than the risk Eversync itself has?

Oh, and is the later risk worse with the free version; I thought I'd try Eversync a bit before upgrading.