Its the best in testing the level of developers and it is useful for hiring process.

Great user interface with a good selection of tests. The UI works great, so far we've had no issues using the tool, we've been very impressed by it and have had good candidates.

The test builder is great, I chose an existing one based on the profile I wanted to hire, and I tweaked it a bit. The whole process took only half an hour. Then for the actual testing, I got a candidate score against the average score for that job profile, that did help me choose the right recruit.