It all comes down to the application, in which "obstacle detection" was mentioned but measuring range was not.
Any method used for obstacle detection will have its advantages and disadvantages. Many variables to consider ... colour, reflectivity, distance, required field of view, optics and focus, etc. Perhaps more details by the OP could clarify.
I stand by my suggestion that this sensor could work well and also have some advantages over other methods ... specifically field of view, high sensitivity and low cost. To demonstrate the viewable area at 1 meter, could take a small super-bright led flashlight with 1" flat black tube fitted over the led, then aim at target at 1 meter. Could adjust the viewing shape and/or area by changing the opening of the tube with slot, square or other shape. Of course, could just view the IR pattern with a digital camera.