Iometer
We reckon the Iometer test is the gold standard by which consumer drives are judged. The drives are bombarded with large-file-size sequential throughput and small-file random reads and writes. By doing this we can expose any weakness in the controller and NAND setup. The drives go through an hour of preconditioning before running the benchmarks.
The word we'd use to describe the performance of the SC300 512GB is competitive.