I would give a 5-star rating if wouldn’t be for one particular feature: the build-in solar panels for the model I bought.I have used the system for more than a month now and here below is my feedback.1. The App- very good and easy to use.2. Central unit/modem – very good, good signal on all sides of the house. I was a bit concerned with the coverage since my house has brick all the way around and is not small. So far I am satisfied. Do not block the unit with other larger objects. You might need to move the unit in few places and check the signal received from the cameras , once they are in their final location.3. The cameras (I have 4) are good quality, image is very good and all described functions working as expected. Rotating head works very well, end to end.I was concerned about the outdoor temperature since I live up North. I’ve tested them until -10 degree Celsius and have not noticed any service degradation.4. Build-in solar panels: in my opinion the panels are sub-dimensioned for the camera consumption. They are not directional (with my camera model) and when you combine that with the installation location, you probably will not have a perfect angle. The top priority is to install the cameras in the best possible position for monitoring and that does not necessary allows the best sun exposure. In my case, only the South side of the house provides excellent light exposure. For the other 3 sides, the built-in panels cannot keep up with consumption and needs the additional, adjustable, solar panels to help. Maybe in places like Nevada, Arizona, Texas, etc. you have more luck but is not my case.I recommend buying the model with larger, angle adjustable solar panels.5. Technical Support: I'll give them a 5-star on this, very responsive and helpful. I initially had some installation problems and later the solar panels issue described above. They were supportive from day one and wanted me to have the best experience possible. I was dealing with the agent called Lynette but I guess any other one would be provide the same excellent service level.So, on summary, is a very good product but do not try to save some bucks on the solar panels if you are not located in the sunny South. They have many models, the bigger the solar panel + directional adjustable, the better for you and less problems.