We have tested many systems and Amcrest / Dahua make excellent High quality CCTV at reduced cost ! Ultra Quality video Protection ! HDCVI or IP Security Camera systems available in 1, 2, 4, 8MP Ultra Clear Resolution ! These new Systems are the best way to go especially for large or small buildings, Systems availlable in 4, 8, 16, 32channel recorders ! Amcrest offers 3 ways to record , #1 Direct to NVR recorder , #2 Direct to onboard sd card , or #3 Cloud recording , Also have integrated video doorbells too !