I think this would be a good first clitoral pump to choose if you've never used one before: a beginner one, if you may. It does not have the strongest of vibrational power, but the suction force is strong and it does clamp on very tightly to your clitoris. It is small enough to make it easily held and easily manageable. The vibrating speed is steady, and there is only one speed available. However, it does have an adjustable slide control that makes the inner stimulator either stay inside the tube, or come out further to make closer contact with your clitoris.

The clamp itself is made of hard plastic (with a removable soft plastic suction ring – this is a good thing since this makes it easily washable). Inside the clamp is the slide control that has small pleasure nodes. Make sure you attach the soft plastic suction ring on well, so that it doesn't fall off.

The only problem I had with this toy was the pump itself. Once it suctions on, you are supposed to gently pump the purple bulb-like pump, squeezing it to release the air and letting go to let it fill up with more air. This creates the pleasurable suction that imitates oral sex. I found that after a few pumps, the bulb will stay squished up and will not take in more air, until you remove the whole thing from your clitoris, and then reattach it, which can stop the moment of pleasure. Again this might be a good thing for a beginner in these kinds of toys, who wants to take the experience slowly. For those used to clitoral pumps, it might not be strong enough for you.

I normally use a much stronger clitoral pump, that is more intense, but it is so intense that at times it is too much so. This pump is good for when you want just a smaller, less intense oragasm.

This toy actually grew on me the more I used it. To be totally blunt, I did not achieve an orgasm with this toy, not the first time, and not until I combined it with a penetrating vibrator. But this might be because I am used to my other clitoral pump that has a much stronger suction force and vibrations.

However, the second time I used this wonderful toy, I played around more with the stimulator which slides in and out, and used the bulb pump more gently, and I was able to achieve an orgasm.

Although I have tried other clitoral pumps that are stronger than this one, it is still quite a good pump. I think this would be a good clitoral pump for beginners, or anyone who has never tried one before. For those used to and looking for string clitoral pumps, then this one might not do the trick.
I still use it every now and then, when I want just a quick fix :-)