The simple answer is Butterfly, but some forum fanatics who don't like their pricing like to say anything to detract from it's reputation. The number of un-sponsored advanced players who choose Butterfly blades and rubbers is disproportionate to any other company. Some may argue that that is because they are copying the pros or don't have access to trying other brands, but that is simply not true. Butterfly isn't even the dominantly marketed brand in many parts of the world outside of Asia.
Take a look at online discussions, when people are looking for equipment alternatives or setting a standard of rubber performance, which product are they almost always using as the standard? Tenergy, a rubber that was released 12 years ago.
Now I'm not saying that most people here would be disadvantaged to use another company's equipment. However one thing that is true is that if you give an advanced player a Butterfly setup, they are very unlikely to find any deficiencies or issues with it. The same cannot be said for most other brands. For an intermediate club level player or worse, which is a good majority of people on forums,they might find that they are totally satisfied with alternatives and that is where a lot of the condescending comments about Butterfly come from. But that probably says more about the player than the equipment.
I will say that Butterfly balls and glue suck. A lot. Nittaku probably is the best in that category. Nittaku also makes some really high quality blades, though the majority of the rest of their blade line is forgettable, unlike Butterfly. Other brands may also excel in accessories or other TT products, but the majority of the time, when talking equipment, people are most concerned with blades and rubbers.
