Tangle Teezer, do I need one?

From the Tangle Teezer website:
The Hair Science Behind Tangle TeezerTangle Teezer is the first of a new generation of detangling hairbrushes! Upon picking up Tangle Teezer you will notice the teeth aren’t like that of an ordinary brush which is where the hair genius comes in. The unique configuration of specifically designed teeth flex just the right amount to detangle and help smooth the hair’s cuticle which in turn protects the inner cortex from damage.

Using the Tangle Teezer will ensure your hair will appear more lustrous by minimizing cuticle damage which in turn will help colour last and reduce the risk of fading. The hair shaft is also better prepared for the onslaught of damaging heat from styling tools. That’s why we like to call it first aid for hair.

I've read numerous reviews, blog entries and YouTube videos. The consensus is that the Tangle Tamer is great. A lady who describes herself as a"lazy hair enthusiast" says this on Long Haircare Forum:

"I used to use fingers, then wide tooth comb, then denman to detangle my wet hair under running water, with conditioner on- mind you.

Now I just use the Teezer by itself, starting at the bottom and after 4-5 runs through, each section is tangle free. No wide tooth comb, no finger combing, no nothing. I even tried it on detangling dry hair and it worked."

She sounds like my kind of lady, honest about the amount of effort she puts in. My hair is getting to be quite a handful, any help detangling would be a boon.
So what do you think? Do I need the next big thing?