I heard great things about qnap but personally I’m using synology for 3 years now (from Hp micro server) and find that the DSM in synology is really great and easy to use. If I were to upgrade my ds416 I will continue with another synology without hesitation :)
Great bit of kit. I tend to knock dsm auto update off after the 1st patch
No hesitation in recommending the Synology. I've always used WD and have never had an issue however comparing them together I'm now gutted I didn't move to Synology sooner.
Keep refreshing just incase!