Thrive Themes makes it easy to build a great looking website quickly. It's probably the easiest way to make a Wordpress site. There is a nice selection of templates for all kinds of uses (landing pages, sections of a webpage, forms, etc). And it integrates directly with most popular email service providers. They also offer responsive customer support and plenty of online video tutorials. Review collected by and hosted on G2.com.

As a Wordpress user it's not so much a downside, as it is the norm, but their "suite" is a compilation of Thrive product plugins, so you just have to keep them all updated. Review collected by and hosted on G2.com.