I've used the goodfella as a pack n play. When I pack I sort of push it to the side so it's parallel with the waist band of my jeans. I wear tight underwear with it to prevent any sort of movement. Their silicone is great.
I do have a cyberskin dick and a vixskin dick and have to say that the cyberskin is not as good. You can clean the vixskin one by putting it in the dishwasher or boiling it, the cyberskin one you can use hot water and soap (which doesn't clean it completely). The cyberskin one has a weird smell that won't go away, vixskin doesn't.
The goodfella is maybe 5 inches long which isn't that big. To me, it was worth it.