I found several samples when searching for "sigma 35mm f/1.4 on sigma sd1", however the first result, a LensRentals SD1+35mm Art kit probably explains the lack of reviews best.

A ~1.1 second (7 shot) burst buffer, noise becoming "prevalent" past ISO 800, and, lack of support ("Note: If you shoot RAW, you must download and use Sigma Photo Pro to convert your files to .TIFF and then export them to the software of your choice, as main stream programs such as Aperture, Lightroom, Photoshop, Capture One, etc. do not support the Sigma SD1 Merrill. Or you can use the Sigma Photo Pro software to tweak your image, though it can be slow and lacking in features when compared to other programs. Once again, YOUCAN NOT OPEN IN APERTURE, LIGHTROOM, ETC. WITHOUT CONVERTING THE IMAGES IN SIGMA PHOTO PROFIRST.") all likely contribute to people ignoring the combo.