Used it on a trip to Tenerife as a supplement to my 400 mm f 5.6
The contrast and sharpness is overwhelmely better with the
400 mm f 5.6. Even my withbrought old Olympus UZ 2100 *) camera could follow the 35-350 mm in sharpness. I have sold the 35-350 and bought a Lumix FZ 30 for family and holiday, and stick to my primes:
400 mm f 5.6 L +
500 mm F 4 +
50 mm 1.4 on my SLR.
*) What a pitty that cameraline was discontinued. It was and is a superb camera.