If you're a beginner, then Chuck Taylors are a reasonable option if you're not willing to purchase a pair of purpose built shoes.While you're starting out, learning the movements, and growing accustomed to CNS adaptability, Chucks work just fine. However, if you'd like to be competitive then Chuck Taylors are not a good choice for weightlifting - olympic or power. Even though they have a thin sole, it is compressible and therefore will not provide an efficient transfer of power between your feet and the floor. Some power will be lost and you will not be able to lift as much weight as a result. While they're a cheap viable solution for starting out, I would not recommend them for lifters trying to maximize performance.