Trickyhat

Hi there. Wondering what people think of this Hikvision model NVR: http://www.aliexpress.com/item/Hikvision-DS-7104N-SN-P-with-4-Ethernet-ports-surveillance-DVR-NVR/1919007896.html This would be my first nvr and I have a couple of questions: 1. Does it have an inbuilt poe switch or router, and would either of these mean that the video traffic can be isolated from the greater home network, i.e. act as a sub network? 2. it claims 50mbs network access bandwidth. Is this for recording or viewing/ 1 or all cams? 3. What do you think of this unit? Any response would be much appreciated. Cheers