"Man from Deep River" is a gorgeous looking, rather lyrical and at times even thoughtful (if rather sluggish) voyage of discovery into the jungle, with a heavy romantic angle to boot, that still manages to deliver the rather less than thoughtful and lyrical scenes of graphic violence and exploitation.
Though the animal deaths will be a step too far for many.
But its also an historically important film from an Exploitation point of view that (although owing a debt to various earlier films) offered up many fascinating, controversial and unique for the time elements.
Many of these elements would later be resurrected (as the film started its slow but popular 2 year trek across the globe) to form the basis for the excellent "Jungle Holocaust", which would itself spawn the rest of that infamous group of extreme 'Cannibal' movies that still remain as controversial today as they were when they first slashed across cinema screens.
It's not the best of the Cannibal bunch for sure, though certainly not the worst, but it is perhaps the most vital.