There is a lot going on in this photo, almost too much. My eyes are going in all kinds of directions . . . you could actually crop it into 3 separate photos.
First of all, I would not have known these were shoeshiners had you you not put it in your title. I see now that there's a man sitting on a stool towards the back, but you really can't tell that he's getting his shoes shined. It would have been better to get someone on the stool toward the front and focus on him.
If your vision/intent was to depict the "busy-ness" of the whole scene, or the activity around the shoeshiners, then I would suggest cropping a little closer so that you eliminate some of the activity on the periphery (guy on cell phone, woman walking, traffic), and/or even convert to black and white.
Overall, a very colorful and interesting photo. Technique and sharpness are excellent. My only issue is that I'm not sure what your center of interest is. This is one that you should have fun playing with to decide what your artistic intent is/was. IMHO. I hope this helps.