Plenty of couples take a break, or even break up for awhile, only to come back together stronger after assessing what parts of the relationship needs work.
It can be awkward and painful to reset a relationship after you've experience the heartbreak of separation, but when it's done healthily, the relationship can come out stronger.
One of the biggest question markes when getting back with an ex, is figuring out whether you want to talk about your dating and sex life during the time apart. Some people prefer to keep that private, and feel it's better to start with a clean slate and bypass any potential jealousy or insecurities.
Others figure it's best to lay it all on the table, so they have a better idea of where the other person's headspace is at. As with any relationship hurdle, there is no simple "right" answer, it all depends on the individuals.