Here's how you import:
http://templates.marketo.com/how-to-import-a-template/We are using a modified version of the Gateway 1 email template and are very happy with it. I've yet to try any of the others in a real campaign, but have downloaded and played with a couple. We haven't tried any of the LPs yet, but a couple look really nice so I'm sure that won't be far behind. The biggest challenge for us is modifying them to fit our existing branding and preferences, but it hasn't proven to be too difficult thus far.