Thank you Yelpers for such a great recommendation. I went to the wrong place at the first time which is closed by and is also on the second floor in a very similar building. Luckily I asked if there is a John and the young lady was kind enough to tell me where the place I intended to go is.
I didn't meet John but John's parents, I went today, which is a Sunday. The old lady at the place mentioned that John now works from Mondays to Fridays and is taking weekends off. They were super nice and John's dad gave good touches to my photos. I am happy with the photos though I think higher definition will make me happier. This is good experience nevertheless.