Been using stainless steel tanks and reels for C-41 and black and white, 120 and 35mm for too many years to think about. I don't shoot large format (yet) so can't comment on that. Admit that coming from plastic reels, loading stainless steel can be a hassle but it becomes second nature after a while. Additonally, I find that maintaining temperature is easier with steel tanks. Regarding leaking tanks, aside from switching to rubber tops from metal some years ago, have had no problems with leaks. Hope this info helps in your decision.