I tried it out with a few contacts and noticed that it outputs mostly Apollo data (emails).
I manually checked other sources they have on their website and noticed quality data did exist, but it seems to return by default what Apollo finds. Since the highest tier has the same limits as a free Apollo account, this doesn't feel very useful for me at it's current stage. It could be helpful for my sales ops if they added API to the deal, but it seems it isn't part of any of the tiers.

As a positive note I should add that Dale and Taskeen were very responsive to my support requests, even though I'm refunding. If you're starting out with sales ops tools this could be a good starting point as they have a few sources you won't need to integrate by yourself (which some of us already did).

If you're reading this, my suggestion is to buy and test it. This is my opinion based on a very small subset of data. Note to the founders: I would be happy to update my review and buy this again should these issues change while the Appsumo campaign is active.