First of all, I need to mention that I am the CEO of Instapage. I apologize for not including this on my initial comment.
We are currently running split tests on our pricing page and the large button is one of them. We'll see what the data says ;)
It's not a bit easier, our builder is dramatically easier. Try the two and then let me know what you think.
We also don't nickel and dime for new client accounts, team members, etc. which unbounce charges $10/each for after you've reach the limits set by the plan. We actually offer unlimited team members on all plans (including free).
Lastly, we are not slightly less expensive. Unbounce's closest to an unlimited plan is nearly $499, however this is hidden within the app.
We are building a landing page tool that anyone can use, not just advanced designers within a marketing department of a larger company.
Example: We provide a wordpress plugin to easily publish pages to a website built on Wordpress.