Perfect size. This was our first butt plug and my wife and I both love it. Take your time with insertion, but once in, the base is very comfortable. It is amazing once in, great fullness. I find this toy stimulates the prostate better than many "prostate specific" toys. For women, it can be used anally while still leaving plenty of room for vaginal penetration. This is how my wife usually uses the toy. It comes with a small bullet vibrator that inserts into the base, but we rarely use this. The hole in the base is actually perfect size for a finger, useful for guiding insertion as well as providing in/out motion. The material is the perfect balance between soft and firm. Very high quality silicone, cleans up easily.
This is our second Tantus B-Bomb. The first one lasted several years, but unfortunately developed a rip in it due to adding a larger vibrator to the base. It had to be thrown away.
The plug is quality silicone, easy to clean. It is a good length and girth, but I wouldn't recommend it for beginners. This makes a good second plug after some experience. The vibrator is kind of cheap and runs on watch batteries, which can get expensive. (How about an AA or AAA battery?) Still, it cheaper to replace a bullet vibe once in a while than the whole plug.
4 out of 5. One star off for vibe issues, but no problem at all with the plug itself.