This might be the buggiest piece of production software I've ever encountered.
Yesterday it was the H1, H2, H3, etc. heading tags not working. Today my integrations with both Salesforce and Autopilot stopped working. There have been many other bugs encountered in the past few months but I've tried to block them out.
Their pricing / product comparison page is also misleading. They don't list UTM Parameters as a feature that isn't available in some versions. But it's not available in their Core version. They claim that UTM Parameters is the same thing as "Dynamic Text Replacement" (DTR) but, according to their own page on DTR, DTR is a different feature (DTR dynamically changes text shown to the user visiting the landing page; in contrast UTM parameters are not seem by users).
Relative to other marketing tools that actually work as intended, Instapage is also really expensive.
At present Instapage is causing more problems than it's solving. Rather than getting stuff done with Instapage, I spend my days discovering and documenting Instapage bugs, reporting them via their live chat, having the live chat person tell me they don't know why it's not behaving as it should and that they need to "consult a colleague," then never hearing back with a resolution.