I have had this specific one for 1 year now and I have to add the following:
1. From a construction standpoint, it is definitely worth it. Where it has been installed, it has survived a winter with all the adverse weather conditions and has not suffered any damage.
2. The image resolution is very good both during the day and at night.
3. Easy installation with 3 small screws for the base of the small solar panel and 2 screws for the camera (provided in the package although I used my own, sturdier ones).
4. The connection was made simply and quickly via the existing WiFi network.
5. Four stars for the speaker quality which, when you speak, sounds like Darth Vader with a delay. However, this is a minor issue for me since I rarely use two-way communication.

The camera has a problem with the speaker, it doesn't always sound. The notifications come immediately, but the recording doesn't follow the movement, resulting in someone entering your space and not being recorded. If you don't get the solar panel, the battery lasts for one week