I give it 3 stars, it does what it says but definitely not worth the price it claims. The price includes only the monitor and nothing else that is shown in the photo, like batteries and the cable to operate the camera's record button. All these are extras and expensive. The battery to get a good one with 7800 capacity costs 56€ and the cable costs 30€, so the total cost of the monitor is 380€. Maybe with this money, you can find something better..

Very good monitor. It supports simultaneous focus tracking and Waveform (Histogram, which personally serves me). Flat and REC.709 display. Supports up to 25 Luts.
The sunshade with the spring opening serves excellently and can be easily detached (requires a method), contrary to some reviews that mention some relative difficulty.
Combine it with a high-capacity NP-F970 battery (I have 7800mAh), which will cover you for a long operating time of the monitor.