The smell of chemicals doesn't bother me. I would think it would be the tedium of hand processing film all day that would be the downside. Obviously, having a self-contained processor for the job would be ideal. Glad there is enough black and white film processing business for them to justify the investment.
The smell does not bother me that much either , but your right being in a dark room popping reels into open deep tanks all day long, and inches away from the fix can over a month get tedious. I went through about 10 assistants before I came to the conclusion I needed to go Jobo to keep decent staff. At one point I had two Alt2300 running pretty much non stop for a few years, then came the digital revolution which pretty much killed film process.
so this is an interesting move, I have said before on other threads that if I was 10 years younger , my wife and I would have invested in a Technolab to do C41 and BW dip and dunk mail order business. At my age and my history I felt that its a game for more aggressive ownership to succeed, and I really am not that interested in doing one off film runs as it basically a production line that needs to be constantly feed and it does not match my next 10 year plan.
This dip and dunk machine that Downtown Camera purchased is world class equipment , shipped in new from Europe with training and I can imagine ventilation is a big concern, as there is a lot of chemicals sitting in those tanks. I think they will be very successful as they are close to Ryerson, Centennial , UOT and OCAD, which all have photo programs, and their store is packed with old film cameras that can be bought at a decent price by students.
They are filling a niche, a block away B3K is selling high end PhaseOne cameras and is filling that niche as well.
I hope to see some people over time use my space as Artist in Residence , to take advantage of my equipment, and some of my expertise and minimal supervision