I had a clone once upon a time, together with several Saleaes and have recommended them to many many people, and that clone was not accurate to me. While the chip and the firmware was probably exactly the same as the original one, the rest of the hardware was cost minimized and did not work as well. I compared. The clone must have had capacitive coupling or something, since signals was often slightly delayed in unpredictable ways. Eg, a bit here and there could be shifted early or late, which is kind of bad when you work on protocols or timing.