Comb increases delivery predictability by improving team communication. Team members check-in with an answer to the question "Will you complete your work on time?". Answers of 'No' and 'Maybe' go on a dashboard for the team to discuss.
Team members know exactly how long a task should take because Comb converts story points to hours based on historic performance. This means that team members can accurately assess how their work is progressing.
Comb also displays stories which were over- and under-estimated so that the team can improve their estimation going forward. You'll also be notified if stories are out of order with respect to dependencies - never start a story with outstanding dependencies again!