Ask HN: Which Customer Support platform do you use?

I'm helping out a startup that doesn't have a dedicated support team yet. They're handling all support issues via email and will need to soon move over to a Customer Support platform.

Currently I'm doing research on: ZenDesk, Desk.com, Help Scout, Helpjuice, and Groove.

• Does anyone have any experience in any of these or any others? • Do you like the tool you use? • Why do you like/dislike it? • How big is your team?

Thanks HN!