The results are the same as done for other muscle groups, but you have to do them properly.
With quads (assuming you need more sweep) you do three shots per outer quad, all shots on the 'edge' of the muscle.
This is a very big muscle, so you do the following:
lower shot 1ml, middle shot (in the 'peak' of the quad) 2ml, upper shot 1ml for 10 days
lower shot 2ml, middle shot (in the 'peak' of the quad) 3ml, upper shot 2ml for 10 days
lower shot 3ml, middle shot (in the 'peak' of the quad) 4ml, upper shot 3ml for 10 days
Then usual maintanance for 6 weeks. It works VERY well, but you have to make sure you get DEEP into the muscle as the quads are very big.