Progasm?

It is bulky enough to be in a league of its own in terms of presence, so you'll get that "fuller sensation" for sure, even the neck feels more substantial (which is surprisingly nice, feeling like you're being held open just that little bit more). It's not the most twitchy model, as you'd probably expect. The increased surface area might be a challenge to lubricate optimally, but I guess that depends on what method you use.

I don't use mine very often, because I'm unusually left feeling like "Yes, there's bulk, but so what?". Sometimes it does shine, and I'm happy to keep it in my collection, because maybe my wiring will respond to it better at some future point (because that does happen - and has recently happened with my MGX, which has come out of retirement to become the star of the show). But it remains one of those models I only pull out when I'm in the mood for something different.

But that's just my experience, lots of other people consider it amazing, and say it was exactly what they needed. So I don't think there's a right answer.

@clenchy It's a great answer! I suspect one of the challenges of playing with a bulky one like Progasm is one may need a stronger "muscle tone" to make/keep it moving. Otherwise a fuller sensation is just an initial sensation and won't deliver the Os. Those who reported great experience may be folks who have more experience and success in hands free prostate play already? I'm just guessing. Would love to hear from them too.