PHL has a verion of this ("Wingmate pass") that I use pretty frequently now! If I have a friend/family flying in/out I usually get one so I can meet them at the gate. It's very nice and convenient. I just wish they would let me use my Precheck, because I have to go through the "regular" security line and sometimes it's just too long and I don't bother.
This SFO version looks a bit nicer, though. You can apply 30 days out vs PHL's 7 days. And PHL makes me choose a specific entry gate when applying. So if you show up and that gate has a long line you can't just go through another gate that has a shorter line (at least that's what they tell you - in practice I've entered through different gates without any problems).
Both PHL and SFO won't notify you whether you are approved until midnight of the day you want to enter, which I find interesting. I guess that's some sort of security feature? I've never been denied, but it could be a hassle if you don't find out until the last minute that you were denied.
This SFO version looks a bit nicer, though. You can apply 30 days out vs PHL's 7 days. And PHL makes me choose a specific entry gate when applying. So if you show up and that gate has a long line you can't just go through another gate that has a shorter line (at least that's what they tell you - in practice I've entered through different gates without any problems).
Both PHL and SFO won't notify you whether you are approved until midnight of the day you want to enter, which I find interesting. I guess that's some sort of security feature? I've never been denied, but it could be a hassle if you don't find out until the last minute that you were denied.