I dive the Hydros and love it.
Plusses:
monoprene straps and backplate coating are very sticky and make it very stable in water. It does not slip and no crotch strap is needed.
Weight pockets very secure and never release accidentally
Inflator very easy to add tiny amounts of air
Minus:
monoprene straps and backplate coating are very sticky and make it tougher than others to get on. (I've never had an issue getting it off in the water)
The optional ninja pockets are a bit small for my hands to get into, but are fine for things that just fit (Like my smb) where I don't have to grope in the pocket to remove it.
Also - does the zen have ditchable weight pockets?
Plusses:
monoprene straps and backplate coating are very sticky and make it very stable in water. It does not slip and no crotch strap is needed.
Weight pockets very secure and never release accidentally
Inflator very easy to add tiny amounts of air
Minus:
monoprene straps and backplate coating are very sticky and make it tougher than others to get on. (I've never had an issue getting it off in the water)
The optional ninja pockets are a bit small for my hands to get into, but are fine for things that just fit (Like my smb) where I don't have to grope in the pocket to remove it.
Also - does the zen have ditchable weight pockets?