It is made of Phthalate free PU coated plastic, which ranks a 7 on the safety scale. It's hard but with a velvety soft coating. Thankfully, it is odorless. It cannot be sterilized, so use a condom for sharing.
The small egg does a good job of staying on the clit when it's inside a pair of panties and the wearer is seated. It can also be inserted and retracted with the attached plastic cord. The cord looks sturdy and well-fastened, and seems like it would hold up well without breaking.
The main innovation in this vibe is that it's controlled wirelessly via a hand-held controller that works up to about 15 feet away. The controller is efficient, as one button turns it on and off and another cycles through three intensity levels and four pulsation patterns, for 7 in total.
One problem is that it is pretty noisy, especially on pulsation patterns. When inserted, the noise is dampened, but when it's merely inside the panties it's as loud as a cell phone on vibrating on a hard surface on some pulsation patterns and the max intensity.
It is pretty powerful, more than enough to orgasm on, but it achieves this with 6 watch batteries. It comes with 12 batteries, which is a nice touch. But watch batteries can be pricey if you buy them in a drugstore, about $3 to replace a set of 6 if you look for deals online. The controller takes one 12 V battery, but it comes with two, and these will last longer than the watch batteries in the vibe itself.
Wash after every use with soap and water. It can not be sterilized. If storing for a long time, remove all batteries.