Complete sentence?

Is this a complete sentence with the right grammar?

"The card for expressing your heartfelt feelings in a way that strikes the right balance between adorable, sincere and tasteful!"

I think the grammar is wrong in that this is not a sentence but a noun phrase, because there isn't a verb.  What do you think?

Hongkie wrote:

We normally use 'among' instead of 'between' when we talk about more than two things. The card expresses your heartfelt feelings in a way that strikes the right balance among adorable, sincere and tasteful.

Hi Hongkie,

Generally, as you said, we use among to talk about three or more items. However, when we have many attributes that add to enhance one thing, between is better.

Here is the rule:

If the situation deals with uniting or sharing, use between.

Between the three of them, they collected more than the rest of the class.