The Double Dipper is great for beginners and those more experienced with anal play. It gives a great double penetration experience and is super easy to use. You could also use it with a strap-on if you are not an individual that has a penis attached to your body.

The Double Dipper is made from silicone. It's very soft to the touch and very smooth. The beaded texture of the shaft has just enough texture to create stimulation but not enough to make anal uncomfortable for beginners.
The shaft is firm enough to move in and out during thrusting and to move with the contours of your insides. This slight flexibility is great because it aids in proper positioning and makes it so that you don't just have a hard shaft jabbing your rectum, but rather something that moves with your body instead.

As far as fit goes, unless you have a girth that is pretty decently above average, I would say you'd be able to use the Double Dipper. Using a water-based lube to lubricate the shaft, it slides on pretty easily with no discomfort. Because of the stretch, it stays in place well during use.
The instructions caution you to limit the use to 30 minutes or less so as not to constrict the penis for too long and cause permanent damage. You should also remove it immediately if you feel any pain or discomfort.

The bullet is a high-powered little thing that only requires one AAA battery. You push a button to power it on and then push it repeatedly to cycle through the 10 vibration modes.
When we used it, he put it on with the vibrator 'up' (think - belly button side of his shaft), and we used it that way. It would also work if you turned it around and put the vibrator 'down' (think - balls side of his shaft) to be able to utilize other positions.

As with any silicone toy, only use a water-based lubricant. The silicone lubricant will break down the material that the toy is made of. To clean it, you can use a toy cleaner or mild soap and water, and then just pat dry with a towel. The instruction manual says you can sterilize it with a 5% bleach solution or alcohol.

The toy came in a discreet package from Edenfantasys. Inside that package, the toy was packaged minimally in a plastic bag with the instruction pamphlet. It does not come with any way to store it.

My husband and I were interested in double penetration but hated using other regular dildos or vibrators because they kept falling out, or we were limited to certain positions to be able to keep them in or move them at all. The Double Dipper was a triple whammy for us!
1. The nuisance of using other toys was gone. With this being attached to his shaft, it was no more complicated than just... having sex.
2. My favorite position is missionary. This allowed us to have double penetration experience in that position.
3. My favorite stimulation is clitoral stimulation, and this definitely provided that!