I used to work for an aeromedical supplier who tried to bash the constant rate profile out of me. The local senior base pilot did the C&T and tought one should get visual as soon as possible so the approach could be abandoned, then fly a small circuit and deliver the patiant or doctor, stat!
Interestingly none of the other bases within the company had the same concept. (the ops manual was nonexsistant)
I argued a strong defence, including Flight Safety findings re NDB approaches, and night circling etc, but he wouldn't budge. So I would fly all the runway aligned approached I could find, and do what he wanted on the checks'.
I don't work for him anymore.
My view is that you'll use less fuel and spend more time further away from the ground on a constant rate descent profile. The figures Richo uses work well. I found over the top for a sector entry at 6500', and start the approach at around 4000' (pressurised turboprop).