I prefer AABB testing because it doesn&#x27;t take me much time to figure out if the test needs to run longer and you get used to the patterns your conversion rates follow pretty quickly in tools like VWO. I&#x27;ve talked to some large CRO shops who do the same thing, as they are working with several accounts at the same time and need to be able to tell quickly how things are going.<p>Then again, CRO is only a piece of my job and I have lots of other stuff to look at everyday, so anything I don&#x27;t have to expend too much mental energy on, but can still trust, is a nice convenience. If I was optimizing full-time, I&#x27;d be a lot more smart&#x2F;clever in how I went about it.