We deal with this situation all day long. We own a state-of-the-art jetter and it works wonders on drains we service. Customers are always skeptical of using the jetter instead of cabling because it costs a good bit more. We made this video to show the difference to anyone who was questioning...
This seems like a good idea for a case where there is one thing clogging the drain you need to clear. If it is a clog of material and sediment built up over time, wouldn't it be easier to take off the trap and completely clear it. But, if it works, it works.
