I bought it, I didn't get it wet even once and the inside got punctured. I ordered another one and the same thing happened—an unused fishing float with a hole like a pin

Very good buoy, with pockets and straps to tie a lot of stuff. Incredibly durable cover. The only annoying thing is that because it is flat, the surface that is submerged in the water is quite large, so you have a lot of resistance while swimming. Noticeably larger than a simple elongated buoy.

Very good buoy. Extremely durable over time (I've had it for over three years and it hasn't worn out at all), with convenient pockets and the ability to put a second weapon on top. The only small drawback is the collapsible pole from the flag, which can come off the top part in strong waves (especially when you are coming out of the sea), but this can be easily solved by threading elastic rope along the pole and securing it with a knot at the ends so that it doesn't come off and can also fold in half during storage.

Very practical buoy. The only issue I have so far is that the flag is not well secured. The flag was lost when one day with strong waves and wind the buoy capsized

Perfect with plenty of space to add olives almost anywhere and compartments that fit things! You can do your job flawlessly with this.

Very convenient for the spear gun. With many pockets and plastic hooks. Definitely needs a patent to hold the flag well in the back of the case, but nothing serious.

Very good anchor but with one problem, in my opinion unacceptable. The top tube with the flag easily goes into the bottom tube that is attached to the anchor, causing it to fall into the sea floor sometimes and I have to search for it. It can be fixed with a patent.
Otherwise, very good, with pockets and attachment points.
Definitely consider additional wind for the rope, and some bungee cords with hooks, and optionally, stainless steel marine keys (instead of plastic ones on the rope and elsewhere) and an anchor.
The price is reasonable.
I would buy it again

Guys, the backpack is amazing and made of good quality materials with many pockets to put whatever you want! It's worth its money and more!

The best thing. No need for any conversion to carry all the equipment. Just one on the flagpole if you don't want it to go down low.

Practical holster. It has several conveniences during use, compartments for a second weapon, and pockets with very strong Velcro. Excellent quality/price ratio.