Powered brushing is something you get used to with time. You are bound to feel awkward the first time you use it.
I would highly recommend investing in such a system of dental care. This kind of a brush reaches and cleans each and every tooth. A normal toothbrush may not be effective. Example: the inner side of the upper incisors can never be brushed by manual brushing. I realised this only after using this toothbrush. So basically, a motorised brush, any brush, is very much recommended.
Now coming to this product, it is good. Good firm bristles, comfortable grip and minimum vibration. Though at some point in the mouth, you might find it itchy in the beginning. You would need to get used to it - a week maybe.
4 star, because I feel the the criss-cross section should be another rotating set of bristles. I find the movement of this criss-cross part not very efficient. Rotating ones are amazing.