I have viewed with some systems and a previously tested even after purchase. The purchase of this camera was really the best thing that could happen with: Easy to install and less expensive than other inferior cameras, which then send a super weak signal .. Although the device costs a little time (20 minutes, because the router is not just standing next to the desk), but is described very simple and very good. To find the correct angles and settings, you have to experiment. For example, you should disable the infrared night light if you want to watch the private entrance through a window because the light is reflected at night so that you only see the mirrored lens. The notifications work well, but in changing light conditions, it can provide to reduce glare through the glass and then is no longer the. Ideal is here that the ranges for the messages can be set variably and easily. About Smartphone perfectly. But I still use the IP Cam Viewer and runs perfectly. I am considering the purchase of outdoor camera from Samsung and possibly even a smaller angle.