At first, i just felt like i was brushing my hair with a barbie brush from my childhood, but it did actually do its job and got the knots out without tugging like normal brushes do.
I've also found after a few weeks that my hair quality had improved and become much softer and shinier. I do however sometimes feel like i don't get a 'proper brush' as its done such a delicate job. However i'd say this is a good thing, it just depends how accustomed you are to yanking at your hair to get the knots out ( i always used to have to).
Its a great design and the shape makes it slot into your hand so easily, and considering how smooth it is its actually quite easy to get a good grip. The only bad thing about this is that it's virtually impossible to put your hair up with it, i have to brush it with it and then use a regular hair brush if i want a bun or ponytail, obviously this is just my experience and could just be due to what i'm used to or the fact that my hairs now much softer. It also doesn't hold hairbands (unless you buy the flower one with a pot) which is less convenient for travel as other hairbrushes can have hairbands round the handle. That being said, it is fairly small and quite compact so it is much easier to take around with you.
Overall, i'd probably recommend the tangle teezer to people who want to get softer hair without it being so knotty. It was particularly useful once i'd bleached my hair as it is much more gentle than my normal brush and so didn't pull as much hair out. It's also helped my hair recover from being quite damaged but this again could just be down to a gentler approach. If you wear your hair up alot then i'd say this isn't the brush for you, unless you don't mind using two brushes. It does have many benefits compared to a regular brush however i do still feel its quite expensive for what it is.
I brought mine from boots for £10.99, though you can find them slightly cheaper elsewhere. They have a range of brushes which is good and they also have smaller ones if you wanted something really compact for travel.