[fluxcapacitor]

I tried exactly the same approach (based on the Lean Startup blog) but I got burned: Google Adwords banned me for life. Seriously! I tried to create another (unrelated) campaign and created a new user for that, and they still blocked me (I guess they are able to track my name through my credit card).

Anyhow, to this date I don't know why (they never explained, and they were quite rude and abrupt on the email). I believe it was because they found out that I didn't actually have a real product. I analyzed the access logs and I believe they actually verify the sites by hand before approving the ad.

In summary, be careful when you use Adwords without a real product.

[arethuza]

Did you actually say on your site that you didn't have a product in an obvious way?

I was just about to do this for a product I've just started working on and I'd planned to be quite honest about the status and simply collect emails so I could keep people notified.

[fluxcapacitor]

I made it clear that the product was under development and a form to collect emails, after the user clicked on the "Sign-Up" button.

I think Google's approach is "Why is this guy paying money to promote a software that is still under development? He must be a spammer!". Of course I'm just guessing that: Like I said before, they refused to give me an actual explanation of why they banned me.