So Far So Good!
I've been using this for 4 months and I haven't had any cold sore outbreaks during this time.  I would use this if you have frequent outbreaks.  Put it on if you're having a stressful day or have any physical trauma to your lips.  You might be able to advert an outbreak or have a less severe one.  This product doesn't dry out your lips like their other product that's specifically for post symptom use.  You can use it all day long for sun protection without it cracking your lips.
Rating: 4 stars