According to this post, Microsoft rereleases service pack 1 for SharePoint 2013. SharePoint MVP, Todd Klindt, wrote a nice little post about it.
However, I would caution to try it out for at least a minimum of 2 months. And monitor the forums and social media to gain insight how the service pack is reacting to production systems.
Here is the link to the main article.
~ Tony Maddin ~