Hikvision Vs 3rd Party NVR - What Should I Choose?

I have been installing a lot of Hikvision cameras recently. I usually bundle it with an Avigilon NVR as I like the feal and featureset.

But I am wondering, am I wasting my customers money? Is there a benefit to go with a company like Avigilon or Milestone over using Hikvisions own NVR?

Thanks

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