This has to be one of the best quality projectors I've ever bought and I've had quite a feW, I am very impressed with this projector.. this is my first time using one..the sound quality that comes out of the box is loud enough to fill a normal-sized room, there is also the option to connect external speakers (cables included). The video quality is great for watching most things (even played ps4 too)
I used it against a standard white wall and the image quality was great. Helps if the room is quite dark and the image is a bit faded if there is too much light.
The only main issue I had was trying to watch youtube when connecting my phone to the device wirelessly, it became jittery/laggy which was the only issue I had with using it.
I found connecting my Chromecast to the HDMI port (HDMI cable also included) and casting it resolved any issues with youtube/Netflix/prime.
Overall a great little bit of kit, it's super light too.