Apart from the waterproofing it offers, I believe it creates several functional issues. The two main issues are poor sound quality for both the listener and the speaker, and a decrease in signal quality, which leads to increased battery consumption. Specifically, in an area with limited signal reception, the mobile phone had no signal unlike a similar phone that functioned normally. It is definitely not recommended for long-term use.

I bought it for my vacation last summer and used it for another 2 weeks until the door broke. After the repair, I left it for use the following summer.

+ Waterproof when new
+ Protects the phone from scratches/drops (except for the screen)
+ Minimal decrease in functionality while inside the case (slight alteration in speaker sound, difficulty accessing ports if you don't have Apple headphones/charging cable)

- Bulky
- Easily breaks
- Quite expensive

After 1 month of use, the charging door broke. Online, they say it's a common problem, the clips that hold it closed break. It was repaired for free within the warranty.

Also, the membrane that covers the home button and allows for touch ID usage is slightly thicker than the membrane used for food and after 1 month of use, it shows significant wear.

In my personal opinion, it's an excellent case for a few days of vacation at the beach without worrying about water, but for permanent use, it won't remain waterproof as some parts are not durable. If I were to buy it again, I would only have it for vacations and not use it permanently.