Fantastic transceiver, both in terms of usability in the workplace and in terms of channels, functions, and effectiveness.

It was used on the ship (commercial maritime, shipyards, etc.), commonly in an environment with many interferences, both due to construction (sheet metal - iron) and due to radio frequency interferences (radar, VHF, telecommunications, and satellites). From the level of the bridge down to 25 meters below (approximately 52 meters with intermediate decks, etc.), clear transmission and reception. Therefore, for those who report interference, it would be good to check what channels they are transmitting on, "day-night" frequencies, etc.
An alternative to this is the UHF operation with its corresponding pros and cons, which we won't analyze here; there is Google and YouTube.

To avoid unnecessary elaboration, the corresponding functions and results to achieve would require a branded tool in the range of 120-150 euros based on what has come into my hands.

Don't think about it too much, in my humble opinion and experience, at 25-30 euros it's a gem; you won't find anything cheaper or better for that money.