Spent more time fighting with split testing tools than actually optimizing. Some claim their A/B testers are the holy grail but half the time the data is flaky or just plain wrong. Tried every plugin, script, SaaS service and honestly, works on my machine but not in the real world. If I see one more tool that promises rocket ship conversions but just throws errors or clogs my tracking I might lose it. Anyone got a reliable setup or are we all just guessing with our split tests?