I like the enterprise version. I am able to pull as many leads as I need and its priced very reasonably. The amount of industries you can pull data from far outweighs its competitors.
The interface is a little clunky but functions well. If you click on a help icon within your search filter page, it will take you to the help screen. This means that once you are done reading and you go back a page, it erases all the fields you already input into the filter screen. Other than that, No issues.
If you need alot of leads, go for enterprise version. Its worth it.
I can pull in a lot of data in a short amount of time.