Have had this dvr for about 6 months now with no issues. Works better and has more options than the previous Security System Kit that cost us about $2000 years ago. Very user friendly, zoom options are great with HD cameras, remote access works like a charm with good video quality even on a mobile device. It paired up fine with the older cameras (non IP) from the other system and with a new HD camera from monoprice. Only needed some cheap cable adapters for the older cameras.
Only disappointment was that Monoprice failed to specifically mention in the specs that a Hard Drive is NOT included. Only states maximum size allowed; not that it comes without one. So I had to purchase and wait for a HDD to come in ($70 for a 2TB) which bumped up the overall cost and timeline. Also, my old system had built-in DC power for the cameras and this one doesn't.
Overall, I'd rather have this system as it was much better and still cheaper than the expensive all-in-one systems we have had in the past. The ability to use my old cameras was a plus; but next to the new 1080p HD camera the picture quality of the old ones are no longer acceptable. Will be upgrading all cameras to HD.

I use this for displaying live feeds from a stage to technicians during performances and rehearsals. It works quite well for my needs. The listing doesn't give much info about this, but it can be used as a remote for PTZ cameras as well as to configure non PTZ cameras, but the interface for that is a bit clunky. It did save me from having to buy a separate device for that task though. As far as it's DVR functionality, it is reasonably straightforward and easy to configure.