Amazing, but not sure if worth the price tag
Because I'm lazy, I only mostly use the dryer + brushes. The drying tool is great on its own for 90% of the days of the year (because ain't nobody got time to curl hair everyday). I found that my hair is fabulous as is just by using the drying tool and the brushes. This is especially great because I don't ever used to have great hair until Dyson came into my life -- less frizz and flyaways, SOFT to-the-max hair, and also my hair is starting to develop those natural healthy hair sheen like in magazines. Before Dyson, my hair was thick, stubborn, frizzy and hard to manage. Take note though that the dryer isn't very strong and takes longer than the Supersonic to dry.
For the curlers, there's some learning curve to overcome at the beginning. But I'm definitely on the fool end of 'foolproof' when it comes to these things (I've never successfully learned to use iron curlers all of my 30 year old existence) -- and I can curl my hair now. In comparison to curling irons, the curls are not crunchy and is super soft to touch, also less frizzy (though I still get some frizzes cos that's just my hair). I don't find that the curls hold very well but my hairs are coarse, stubborn and don't usually hold curls anyway. But even when the curls loosen up my hair is still much nicer than usual.
The downside is the price and the material. Other than the leather case and, of course, the inner engineering, I don't feel that the material or attachments are premium or worth $799. The dryer attachment hit my light wood bathroom door for a teeny tiny second and it now has a small dent (like what kind of material was used to make that?).
If you can commit to using ALL the tools everyday (which I cannot), this would be a great value-for-money buy. If, like me, you can't commit to styling everyday, I still find it worth the spend only because my hair is at its best in my entire life (but then you could also just get the Supersonic).
All in all, I justified my buy in the sense that this is worth a long term investment. But if you already have great hair, or have other tools that do its trick without damaging your hair, I don't see this as a worthy purchase.