My main concern with the design is the base. I considered a base that had more of a curved edge, but went with this. If the wearer's, um, cheeks, are quite perky and close together, then they might experience discomfort with extended wear or sitting because the base will rub against their cheeks. Nothing that can't be fixed in bed with added lube or a position change, but something to consider if you plan to use in public.
The size is nice for wear during play or sex, but I think that it might be a bit heavy for extended wear. This is definitely not a plug I would recommend for first-timers, but if you're comfortable with extended periods of anal penetration, go for it. It's easy to travel with because it can hide nicely in a small box, or bag, and it doesn't vibrate, so no worries when your luggage is jostled! However, I can see how it might resemble a small missile on an x-ray scanner, so unless you want to let the entire TSA screening line know what you did in Vegas, I'd pack this in the checked bags!
Kate, this is a great point. It should only be used with a water-based lube as it is a silicone toy.