So utterly useless then. And expensive.
Pros:
Cons:
- Shiny
- Big limitations for use with rich decompression gasses -- meaning buying separate regs when you can just buy one type of reg for all uses
- Very expensive compared with the many equivalent regs (Mk25, DST, etc.)
Perhaps to you, O2>40% is important and hence you should look for other regulators to suit your application but for the 99.99% of the market worldwide, 40% or less is just fine. Use the right tool for the right job.