Dyson have just released a new brush/dryer, called AirSmooth. I ordered it and have tried it out once so far, but it has made my thick hair go enormously puffy. I am going to try again with more products and a few more attempts to see if that helps, otherwise I will have to return it (Dyson allows 35 day returns). A lot of the reviews are really good though and people seem to like it.
I tried Shark Silkipro earlier, and I liked the finish better (probably because it has ceramic plates), but the plates caught the edges of my hair and I could feel it tearing/tangling, so not going with that one either. Was thinking of trying the Shark Glossi, as QVC also has that (also allow you to return). I think that's the replacement for the smoothstyle mentioned above.
I have also tried GHD duet blow dry, with ceramic heated bristles, but had a similar problem to Dyson smooth, just seems to make my hair puffy. The Dyson Airstraight is good, I have a secondhand one of those and like it for the smoothness, but not for the ends as my thick hair just ends up hanging with severe/blunt ends and no bounce, and I can't seem to put any curl back in them once it's been straightened. I had high hopes for the airsmooth, and you might like it as a lot of people seem to, unless you have very frizz-prone hair like me.
Maybe it's my technique or products - I use colorwow dreamcoat, and then have tried a sort of leave in conditioner spray, or the ghd sleektalker wet-to-dry oil. but just end up with thick slightly wild hair, not smooth or glossy at all, but huge.