I was skeptical at first on these freshly new shoes vendors, but when I tried out their products, it's on-par quality with the existing vendors. Even more, often time, these newcomers has far durable product than the traditional vendors.
My guess is, traditional vendors aimed for the too high end product and losing the durability. They aimed for the high friction and more natural naked foot feeling, resulting their sole ever softer rubber and thinner. Usual climbing shoes sole has 4mm thick. But these high end product go as thin as 2.5mm.
If your weight isn't less than 50kg, you'll wear it out in 3 month.
My other complaint for a particular famous Italian climbing shoes vendor is, that they don't use strong glue. Perhaps, Italia is less humid than Japan so their glue doesn't need to be that strong, but this particular Italian-made shoes has serious issues on their glue so the shoes start to disassemble itself before the sole wear out.