IP cameras are great within an "interior" campus network or building network that is 10/100 or gigabit ethernet. The cabling is easy (PoE CAT5E or CAT6), the images are very detailed and the cameras can be megapixel and above. There are "hybrid" DVRs now that support analog and IP cameras. The cost of IP cameras is two to four times the price of analog cams and viewing IP cameras over the internet could have higher bandwidth requirements than analog due to the higher resolutions. For simpler residential installations of 4, 8 or 16 cams where the customer wants to view and control remotely - it may be better to stick with analog.