its actually quite good, and for the price you cant really complain too much.
I chose a wired over wireless system for two reasons, it cant be hacked/blocked as easily, and it wont put extra traffic on my existing wireless network. (even with most wireless systems you still have to get power to the camera, so some cables are still required, just not as many or connected back to the main unit.)
Negatives are the menu's and manual are not great (chin'glish) so it takes some time experimenting/learning to understand and find all the options (google & youtube are definitely your friend for this). The cables have a bulky'ish water resistant RJ45 connector cover at the camera end, and you will need to route the wire around all the way from the control box to wherever you place the cameras (so may need to some drill 10mm+ holes or have existing access holes or vents if you place the cameras outside) .
The 'x'POE is proprietary, not compatible with other POE kit if you have that, and wanted to integrate it somehow.
I think you'd definitely want a bigger HDD than 1Tb, esp if you are going to have all 4 cameras set-up, but it will be OK to get you started.
If you want a domestic cctv system that has all the features, and a prepared to put some effort into installing the wires and understanding the interface, THEN, at this price it is great value.
(PS yes there is 'sannce' app to view the camera's via your phone) (edited)