Hi I am a permanant customer of this brand.
I have a 16 ch dvr intalled with 12 turbo hd 1080p cameras. The quality of cameras is amazing
Moreover this dvr has some unique features
Which u cant find in other brand.it is very easy to use. And it has its own app to watch cameras online in the phone.which is imvs 4500.
And I get same king of HD quality as on my big led tv. 720p hikvision camera and dvr are available in good price. But I chose 1080p .it is a best cameras ever I have seen in my life.one more feature of this product is.when u zoom ur camera veiw.pixels doest get split.