RainKing is awesome if your organization is planning on using it to help you acquire more targeted leads that fit well in the space you are going after. I love that there is no limit as to how many companies you can go after. The CSM that I worked with (Will Elchorn) did a superb job of answering any and all questions that I had.
Being able to search for companies that are currently evaluating solutions in your space.
The contact information for people and related people is also great, I have used dozens of other data solutions and prefer Rainking.
Rainking also gives you the ability to create lists of your ideal buyer and download them which was great for my team and I pull new contacts to prospect!
I can't get over how impressive the org chart info is in RainKing, it allowed myself and my team to find other involved prospects and get a good feel for organizations.
I'm not a fan of my account manager. He's not the most responsive.
There are limitations to the software (ex: I've found several instances where I get a message that says I need to pay more to get information about certain people/companies).
We actually originally went with another product but changed our minds because of the price. While it may be pricey, it costs less than other products we looked at; however, this doesn't include [the hefty price tag that comes with] federal data. We're still deciding whether to purchase government/federal data. I also really like RK's customer support - they seemed very nice and genuinely wanted to make sure we were getting the best ROI.