I've been trying out a few K&F Concept products lately and I'm really liking this brand because it offers good quality at lower prices compared to other well-known brands.
I have a bag similar to this one for when I don't need to carry all my gear with me and since it's a few years old, when I saw the K&F one, I wanted to try it out.

The materials it's made of seem to be of good quality, both the fabric and the zippers. The fabric is relatively thick but light, all the seams are well-worked and it seems like it can stand the test of time. The closures are shaped like a strap with a buckle but are actually magnetic and close easily.

-The main compartment where the camera and lenses go is very well padded and can perfectly accommodate a camera with a lens attached in one of the three compartments that we can adjust the size to suit our needs. I usually carry a Canon EOS R6 with a mount adapter and an EF 50mm f/1.4 in the middle, an EF 24-105mm f/4L on one side and a powerbank + 2 spare batteries on the other side.
-On the front there is a compartment where we can store accessories such as circular filters and some lens cleaning cloths. If we need it, there is room for more things but I prefer not to fill it too much.
-On the back there is another compartment where we can put the waterproof case that is included and as with the front compartment, it also has some space for more things if necessary.
-The waterproof case is easy to put on and has two slots on the sides to pass the two strap hooks through so you can put the bag over your shoulder with the case on.
-The strap seemed to me, like the bag, to be of very good quality although it would have been nice if they had put a padded part for when we carry the bag on our shoulder for a long time.

Overall, I think it's a good bag for the price and the only thing I miss compared to my old bag are two side pockets, which although they are not strictly necessary, are always good to have.