I have several PC oriented instruments, all have performed very well, except the PC Based USB Oscilloscope which has been a nightmare. Imagine typing the keyboard, moving the mouse and probing the circuit board simultaneously, frankly three hands isn't enough. The logic analyzer, the signal generator and pattern generator work extremely well, however the PC Based USB scope just does not adapt itself well to the PC environment. I suggest saving your money and invest in other PC based instrumentation like the logic analyzer, which has performed beyond my expectations, and purchasing a standalone DSO for the bench. One of the scope's most beneficial attributes is probing the circuit at will, which is not conducive to the PC environment with a keyboard and mouse to contend with.
BigDog