I've been using their basic free version for several weeks, and I love it. I jumped from just over 600 followers to over 1,000 in a couple of days after I started using it. I get great benefits for my online business, and Commun.it is helping me find the right people to grow.
I tried all the free products similar to Commun.it and none compared for functionality.
I have never had to give my credit card information to use the free version.