I purchased this NVR as a replacement for an old unit, to use with 4 existing Hikvision cameras that I have installed at home. Setup was pretty simple and I was up and running in no time (apart from forgetting the password I'd set on the actual cameras!). Easy to use interface and some great features such as motion detection and events. The unit sits in my loft, and is easy to administrate with a web browser. Happy with the iPhone app for monitoring the cameras, both on the local network and remotely. The only downside I've found is that the Hikvision cameras need a plugin to be viewed via a web browser, and none of them seem to support this any more so I haven't been able to get that to work. But it's a fairly minor issue for me personally.