Rating: 4 stars

Simple and effective. I do not give it 5 stars because it does not remember the version that it showed to a user to repeat it on their next visit and because it does not include a significance calculator to know when to finish the test.
Another important limitation is that only destination url targets can be defined.

Rating: 5 stars

This plugin is amazing. Makes A/B testing a breeze. Super well thought out and no issues at all. Thank you!