The dryer is great if you do not have the vertical space to hang film. I used Nikkor SS reels, and I do not remember if I used PhotoFlo or not, I probably did.
The problem that I had with the dryer is that the film is dried on the reel. And the problem with that is the film will forever have a curl to it. That curl can be a PiA to deal with when you cut negatives to 5 or 6 frame strips to slide into negative holders, and to use in some enlargers. After a few rolls of that, I stopped using it, and cut my film in sections and dried each section vertically, which kept the film flat.