The Twin Bullets are made of PU Coated Plastic. They are smooth to the touch, and if laid on a bed their round shape can cause them to move around a little. The toy has no scent, and is easy to use.
The Twin Bullets are simple in design. There are two bullets attached to a control pack via a set of non-detachable cables. The bullets are of about average size for an egg vibrator rather than a bullet vibrator, and the control pack fits nicely into the hand and is easy to use. While the toy is not discreet in appearance, it is relatively small and easy to hide under blankets or in a drawer or bag. It can easily be taken on vacation with you, if you want.
The Twin Bullets have three buttons. The middle button (o) turns it on and off. The top button (+) moves you to the next function, and the bottom button (-) moves you to the previous setting. While the bullets are waterproof, the control pack is not, so I choose not to use it in or around water expect for cleaning purposes. Given the design of the toy, the vibrations seem to be located throughout the entire bullet. It is not overly loud, and is not likely to be heard through closed doors.
The Twin Bullets are relatively easy to care for, though they are not be entirely waterproof. The bullets themselves are waterproof, so they can be washed with soap and water or your favorite toy cleaner. As the control pack is not waterproof, I'd wash it either with a cleansing wipe or by wiping it down carefully with a little toy cleaner and a damp cloth. It stores easily in a small bag placed in a drawer. PU coated plastic can be used with water-based and silicone-based lubes. It is also hypoallergenic, latex-free, and phthalates-free.
While the Twin Bullets use two AAA batteries, I have found that they last a reasonable amount of time. You should be fine using the toy for a full session with one set of batteries, however, just in case you have weak batteries you may want to have a second set on hand. I have found that rechargeable batteries tend to be a nice option for use with toys, and save on battery purchases.
The Twin Bullets were a little larger than I was expecting as I did not pay attention to the size information provided on the products main page, and they are honestly more of eggs than bullets. They are an inch in both length and width. Either way, they are stronger than most eggs I have used, and are nice.