Kudos to both the Harmony Hub and Hue plugins! I use them both extensively and have great results.

You may have saved yourself some frustration by not adding Hue to your Harmony hub. I did that back before I deployed Indigo, and the results were... less than optimal. Granted, this was not long after the integration between the two was first implemented, but my experience was that programming the lights in Harmony was a pain, reliability was spotty, and it generally seemed to gum everything up and make my Harmony setup slow to respond.

Thanks for the success story!

I was getting ready to connect my hue hub to my Harmony setup.

Then I realized:

The excellent Harmony Hub plugin reports state changes to Indigo. I just can't think of a situation where I would want to change lights with the Harmony remote that wouldn't already be handled by reacting to a status change from the HH plugin. And Indigo can react in ways much more flexible than can be managed with a couple of buttons on the remote!