Not that great. Can be surprisingly hard to differentiate in both field and photograph, depending how much of the relevant feather is visible, whether it's faded or dirty, or how clear a look you get. But yes, looks good here.
Another helpful hint you can see in the photo is the black stripe cleaving the red crown (not diagnostic, but highly suggestive):
www.sibleyguides.com
The photo also shows the head/neck pattern of Hairy:
www.sibleyguides.com
(Mostly reliable, but subject to vagaries of feather-fluffing and neck angle)
But you don't need any of those in this photo. Bill length is diagnostic.