Horrendous customer service
I bought a Nimar housing for my Canon 6D in April 2019, and it flooded after just 4 dives - destroying my gear.
I contacted Nimar's customer center who ignored my emails and phone calls for weeks, until they told me to ship my housing back. They performed testing (or at least they said they did) and concluded everything was fine, so I would pay for the housing electronics damaged in the flooding.
I requested to be contacted so I could at least explain the details on how the housing failed (especially after being told from one of their resellers their lock system could theoretically allow a panel offset, thus a leak). Not only they never called, but they threatened me to sue me if I wrote a bad review instead (I quote : "should we learn of conduct aimed at defaming or discrediting the reputation of NIMAR Srl., we will refer such behavior to our legal office").
In the end, I will never know why my Nimar housing failed. Maybe it was that lock system design issue, maybe something else. But what I know is that Nimar, on top of having a horrendous customer service, does not want to hear customer feedback - so can not possibly be serious about improving their products.
In a nutshell : if you are planning to dive in Nimar's test lab, maybe their product will suit you. If, on the other hand, you want to dive in an actual ocean, stay the hell away from them. It is by far the worst investment I have ever made, and I bought a minidisc player in 2001.