First of all, you should know that Unless is not an A/B Testing tool per se.
Nonetheless, many of our customers use Unless to experiment with content. Although it doesn't provide an A/B Testing Dashboard, you can quickly see how your ideas perform.
How to set up an experiment:
With Unless, you can create simple experiments that strongly resemble an A/B test. For this, choose a page, create one variation (we named ours Version B) and choose "Everyone" as the target audience. Next, set the control group to 50%.
Result: 50% of the traffic you direct to the page will be sent to the variation and 50% will see the original, unpersonalized version of your page (click to enlarge).
To analyze performance, follow our Google Analytics guide.
If you already know that your website isn't compatible with A/B Testing Tools (which is often the case for Single Page Applications), you might want to take a look at our solution as an alternative.
Why we only support simple experimenting:
Generally, testing your personalizations is a good idea. However, running proper experiments requires a lot of traffic and the more variations you test, the harder it gets to reach statistical significance. Also, the longer you run a test, the higher the risk of results polluted by external factors.
To prevent this, we put an emphasize on continuous monitoring and offer a control group. Visitors assigned to the control group will see the original version of your page. This way you can always check how your variations perform in comparison to the unpersonalized page outside the realm of A/B testing.