The G rider has a bigger base compared to the G-play so the G-play may be a better option for sitting. Neither one stays in all that well so unless you wear tight undies they are not the best for wearing around in public. For that something along the lines a real plug would be better, the Ryder and Pure Plug -BillD mentions are good choices and the Love Pacifier would work good too.
I am a guy that has used one of the manual Aneros toys before but now I am looking at either the Nexus G Play or Nexus G Rider. Seriously... I am just a bit troubled when making the decision because the G Rider is pretty big. If the G Play Large is big enough and basically has the same vibration, I am thinking that the G Play is good enough. My question for someone here is... is the G Play Large going to be be enough to rock out your prostate or is the G Rider more or less the new necessary? Hoping for answers!
PS - Yes, I might want to leave it in at my computer sometimes but not exactly my main goal.