Anyone who likes old twin hose regs will probably be disappointed.
The plastic on the Mistral doesn't come close to the old metal regs.
It actually looks and feels very cheap ... not at all like a $900 reg!
Even the mouthpiece doesn't come close to the cheapest rebreather DSVs,
much less the more expensive ones (either machined or molded composite).
ScoobieDooo:
I'm also curious how they made the 2nd stage and how well these are gonna breathe. My guess is perhaps since they put the diaphragm in the newly-designed 2nd stage in the mouthpiece (I hope) - that it should breathe fairly well.
The second stage is in the back, below the first. On the picture you can actually see the low pressure hose coming from the first stage that supplies the gas.
The WOB does indeed include both inhalation and exhalation effort, and on this regulator, like on rebreathers, the mushroom valves in the mouthpiece play a large role. If they're stiff they seal well but breathe hard, if they're soft they breathe better but may allow gas to move the wrong way.
Aside from the WOB, with the second stage on your back hydrostatic differences (relation of lungs and 2nd stage in the water columm) will play into it. There'll be a "sweet spot" for breathing the Mistral.
Haven't had a chance to try it yet, but a friend just took one out diving and was pretty disappointed in the breathing performance. She had high hopes as she shoots a lot UW. When I get my hands on that reg I'll report back.