I have been using WPfunnels for about a week now; I didn't have too many problems getting the plugin installed and set up. There were a few hiccups I experienced but I did some research and was able to solve the problem myself without reaching out to support.

Issues:
1. My first funnel just disappeared on me, I still don't know what happened to it. It still existed somewhere, but wasn't showing up on my dashboard or within the funnel itself.
2. My payment processor kept saying Cart Timed out. I fixed this by deleting the other plugins that was there. It appeared to be some kind of compatibility issue. So I kept only the basic and the pro version of WPfunnels.

Pluses -
1. it's really simple, I am not a pro with wordpress, more like above average knowledge when it comes to wordpress and I had no problems setting this up. I created a very simple funnel and tested it and it worked like a charm integrating
a. woocommerce
a. a wishlist member - a membership plugin.
2. it easily integrates with any page builder you're using, I am using just gutenberg and had no problems building an awesome funnel.

What i'd love to see, some kind of integration with a mailing list provider such as mailchimp, mailerlite, creative campaign etc. I use mailerlite so that would be pretty awesome.

If you'd like to see my basic, no frills funnel built with WPFunnels, you can check that out: https://www.katiemcbrien.com/spirit-guide-special-offer/
It's just three steps.
1. Sales Page
2. Check out
3. Thank You page.