I received this toy as a gift and at first I was totally perplexed by the shape, thinking it was one of those odd impractical vibrators, but it ended up being so much more! I do really like this toy, but before I discuss the rad features, I should mention that it can be difficult to clean. To wash or boil the silicone, you have to remove the bullet vibe, which is a bit hard to get out, and make sure its vibe hole is dry before putting it back in. Despite this one shortcoming, I find this toy to be great, and much more practical than it may look.
The rock chick is great for g and p spot stimulation. I love that it can provide internal stimulation while giving you a vibrator to rub up against and use as a jerk off aid. It also stays in pretty well for hands free stimulation and orgasm play. The internally inserted end is not big; it is not very big in girth and also a pretty short and manageable length. Don't let that be a deterrent though. The main great feature of this product is the curve. The curve shape is very fun to play with and easy to manipulate without much confusion (I hope).

Even though it is a weird shape, you can fit a condom over it, which is how I usually use it. I advocate using water based lube with this vibrator, but just be conscious about getting too much fluid on/in the bullet vibe and its hole. The batteries worked for quite a while before I needed to replace them, but generally the toy gives off softer vibrations when they are dying.

This is a great jerk off aid, and an internal g spot stimulator and external vibrator.