I did this because I had been wanting a 4 ch DVR for a few years now and the prices have been falling a lot in the last few years.
I know nothing about this stuff! After having three astak DVR's fail. I did what I needed to do in the first place and read up on this stuff.
The astak specs out good but there QC is in the dirt.
The astak cameras where of such low quality, I had to replace three of them right from the start.
I went with the G4 4 RTA because of what I found online in the forums.
Also for the $720. delivered, I really could not find anything better for less money.