Cons: My dislikes are more nit picky than complaints; setup of URLs can involve 2 separate screens, which makes it a little confusing at first. It is template driven and some of these are very Internet Marketing centric, so the look and style may not be a fit, but of course you can adapt and make these your own. A broader selection of templates will help, but they do have a community of developers adding to it daily, so this is likely a short term problem.
Or, are you a leader, an adventurer or an evangelist? How you position yourself is entirely up to you, but your message must be consistent throughout your entire "pitch" and it needs to be steeped in the truth. Your backstory, and just how you convey that through parables, character flaws and polarity, has much to do with just how well you can "hook" in your prospects to create a mass movement.
Of course, some of you are makers and originators and you really want to build your own thing and that's totally fine. I would just say, make sure you adhere to direct response principles and philosophies when it comes to creating your funnels, that is something that's super easy, but the best way, as Russell Bronson of ClickFunnels, he's the founder of ClickFunnels and DotComSecrets. He's a big proponent of what we call funnel hacking. Funnel hacking is something also that I've written about on my blog. As a matter of fact, I'm hoping this link works. Yeah. I've created a funnel hacking playbook.
Pros: Funnels involve many moving parts, pages, and pieces. Having designed these for years myself, I expected Clickfunnels to be another newbie tool, but it's so so much more. You can easily set up funnels for specific markets, tying them together and tracking in a way that's visual (not Kanban, but close) and easy to understand. Instead of complex interfaces, you have an easy step by step way to get things going quickly. As an experienced user, I was impressed by the value this delivers for people regardless of skill set. There's so many smart elements - for example, preview your page and it shows you the version regardless of cache, so you're not stuck emptying your browser. Few years ago this would have cost you thousands to set up individually, and left you needing tech assistance. Clickfunnels eliminates that and makes it so even a beginner can use this tool.
Prospecting and marketing are all the things you do to get people into the first of your sales funnel stages. Note that stages are broken into two or more steps wherever possible. A demo could be called a single stage, but in real life it involves a lot of things: contacting the customer, sending reminders, doing the demo, and then following up. Whatever your own sales stages look like, the support you need in managing them will be the same.

Clickfunnels: Review, Demo, Pricing and Features: