WhiteSource

Fast, quick reviews of your code. They do a good job of putting all the relevant reports and dashboards in front of you quickly. Once you manually fix everything, it can look really good.

The false positives are awful. I had to spend hours and hours manually fixing everything it mis-identified - dozens of libraries and thousands of source files. If you use a library not in its database... too bad. You can make a support request and wait for them to enter it for you, whenever they get around to it.
The search is pretty awful. There is some kind of syntax to using it but when I asked our account rep, she couldn't give me any documentation on it. You will frequently see results like "openssl-v0_9_8" in your search, but if you type "openssl" it will vanish and not come up. Don't ever both trying to search for a version, it doesn't work. This results in a lot of time scrolling through very large lists. Naming schemes are random and follow no established pattern.
For a good half of all libraries, they have not assigned a license. Guess who gets to go google search them all? You, the user! Isn't the point of this tool to help me identify the licensing?
UI navigation is challenging. Back button will take you to a different place than you were almost every time. You'll love the dashboard... because you have to go back to it roughly every 5 minutes and start over.
No great system for notes/todos/reminders. When you have to fix 60 libraries, it's hard to remember what you want to do with each one.