Adwords to drive traffic and growth

Hi folks,

I am thinking about investing in Adwords campaigns to drive traffic to my new product thedailyapp.co. I want to do this in parallel to regular content-marketing.

My hope is to get some traffic to further test different landing page versions, conversions, feature ideas etc. Given this strategy, I have the following questions:

Are there any folks here who use Adwords as their primary traffic channel? How has the cost, conversion, quality of leads in been for you?
What are some of the pitfalls with this strategy I should watch out for?
If you think this is a bad idea at this stage, why is that, and what else should I consider?
Are there any coaching, consultants, resources you can recommend to maximize success?

Really appreciate your help,