Ruger - Very good (maybe excellent, but haven't had any issue that would create the opportunity to prove it). My story. My LCR front sight vibrated loose and fell off someplace. Ruger sent me a new sight and roll pin within the week. My smith hung it on for a very nominal fee.
Henry - Excellent (actually HOLY COW!). My story. I bought a Octagon-barreled 22 Magnum (Henry model H001TM) used from a gentleman for a pretty decent price (it had a couple of dings on the buttstock). On shooting it I noted some key-holing. I thought it might be ammo but Googled using "Henry" and "keyhole", which led to a site or two that mentioned they might have had some QC problems with some barrels. I sent a note to their CS site and had a reply within a couple of hours telling me that they would replace the barrel, followed by instructions to retrieve a UPS label and package the rifle for shipment. Remember this was a used rifle, and please note also that I informed the Henry CS rep of this fact.
That was on March 21. I shipped the rifle on March 26, and it arrived at Henry on March 28.
It arrived back at my house yesterday, April 3 (I actually took delivery today, April 4 as I missed the UPS guy yesterday). On opening the box, the barrel had been replaced as promised. I also noticed that it was packaged like a new one (with the little sock on the buttstock and sleeve over the receiver, and a new owner's manual). My buttstock, which had a ding or two (noted above), was replaced with a new one. Recall again that this was a used rifle.
Six days from receipt to arrival back at my house. Wow. Just wow. I need another Henry.