Designmodo has a ton of quality mockups and resources that rival most other design resource sites. It's a design resource site that you can tell was built by designers. The articles they write are not just fluff pieces for SEO, but actually help me in my daily work or just to get better at different skills. Almost all of the free resources are pretty solid for when you need something quick that is also of great quality.

The cost of the platform is under $300, which, when you figure in other options, that are not that easy to use nor easy to build from a WYSIWYG standpoint, is really a great offering.

It's a great community to gather web design and web development knowledge. I like the ease with which we can manage postcards and templates for editorial sections, color codes of the templates. It also works on all the platforms I have tried it on (desktop, laptop, iPad, mobile).