This is what persuaded me: Why are they so special?
There are so many different versions!
    Too many colors to choose from!
I couldn't live without it.
...
They attempt to correlate to each other()
| round brush | helps with styling | not very sturdy bristles | 
| origional | detangles hair easily | can be used in shower | 
| mini | easy to transport | detangles on the go! |