I don't know how well they work as I shed mine on the day I qualified
I think they're pig ugly but that's just MHO
Fitted a Halcyon inflator and I had a spare Scubapro R380 2nd stage so that hung below my chin on a necklace holder.
That took care of wing inflation and onboard bailout for early Vision dives.
Once I started diving that much deeper, I removed the onboard bailout as a 3L diluent cylinder doesn't last long (at depth).
The Halcyon inflator hasn't missed a beat in 2.5 years.