Highly recommend. The headset output jack on my laptop broke, and a USB sound card was the only way I could get audio output.
Use shielded cables whenever possible, to minimize AC hum.
Qty=2 are for items that are often used or lended to other callers - you'll rarely get them back!
Identify your cables and connectors, perhaps by attaching colored tape or name tags to each component.
The above list should be sufficient. Occasionally, a connector not listed above might be required (for example, a 1/8" female to 1/4" male), but you'll be able to combine two of your connectors to get the desired result.
If you know of any other item that should be listed here, Contact Vic