Hi Ben,
Thanks for the answer! Sorry if I wasn't clear in my original question, but we are actually using Unbounce for PPC testing already.
The pages that we are planning on creating are not necessarily landing pages. It's just much faster for us to create pages/content on Unbounce at the moment than it is creating actual pages on our site. (That way non-devs can work and create new pages as well.)
In your opinion would there be any major downsides to creating some page on unbounce? Obviously it's not ideal, but if there are no major issues we might use their service albeit temporarily.
Thanks!
Seiya