From what i can make out, it appears that it doesn't give you an actual readout of the IP but only an "OK" / "notOK" readout. I suppose that it makes sense to have something like that. Gear up, pressurise and see a nice big OK on top of the 1st stage, that would add some re-assurance maybe, especially if its been a while since the last service and you are going on a big dive.
Not a have-to-have by any means but Im sure there are those who would find that useful. I have an IP gauge and cant think that I have ever used it routinely on the boat before a dive. Usually I use it as a response to a problem.
Maybe think of it like a check engine light, it doesn't replace any service requirements etc but does give you a heads-up that there's something fishy going on.
Not a have-to-have by any means but Im sure there are those who would find that useful. I have an IP gauge and cant think that I have ever used it routinely on the boat before a dive. Usually I use it as a response to a problem.
Maybe think of it like a check engine light, it doesn't replace any service requirements etc but does give you a heads-up that there's something fishy going on.