What to expect from startup landing page generators

There are hundreds of landing page generator services out there — Unbounce, Launchrock, KickoffLabs and Instapage are only some examples. But what can you expect from these services? Or is it better to create your own landing page with WordPress or even a static HTML site?

I have tried a few of these services during the last years. Let me share my experiences with you…

UPDATE 2020:
I have still been struggling with landing page builders. Most of my applications have custom built websites, because it was quicker and…