The first thing I noticed about the Dyson corrale coolshine is that it’s less clunky than the original model. The hinge sits further down the tongs, meaning those with longer hair will have more space to curl hair around the barrel. It’s also much lighter than the original straightener (361g lighter, to be precise). Admittedly, it looks a little heftier once you slide on the optional cooling attachment – even so, it only weighs 85g. Another design change is that the brand has decided to ditch the cordless functionality with this update, and I'm not disappointed. I can count on one hand the number of times I've needed a hair straightener without access to a plug.One of the most interesting things about the tool, though, is its cooling attachment: two pairs of heat-extracting pipes filled with distilled water cool the hair as it exits the heated plates. Not only does this ensure that the straightened (or curled) style is set into place – much like the cool shot on the airwrap – but it also prevents residual heat from damaging the hair. While I wasn’t able to test these damage-prevention measures long-term, I watched my dull 3pm hair exit the barrel looking noticeably shinier, particularly so after two passes. Another development of the corrale coolshine is the unique shape of the plates. The two plates are slightly curved to cocoon hair within the straightener and prevent strands from slipping out the sides. I’m guilty of trying to straighten large clumps of hair at once, so I’m particularly excited about this design change. Curling with the cooling attachment is a little hit-and-miss. While Long assured me it’s possible, I watched as a few testers tried and (mostly) failed to curl their hair with the pipes in place. As with many Dyson devices – namely the airwrap – I’m sure there’s a knack to the process, but for those curling in a hurry, I’d stick to the straighteners sans attachment. The straighteners with the cooling attachment (left), a look into the coolshine attachment and hot plates (middle), and the straighteners without the coolshine attachment (right) (Lucy Smith/The Independent)One of the key draws of the corrale coolshine is its £249.99 price, making it more than £100 cheaper than the new ghd sculpt, an equally impressive tool in its own way. It’s great to see Dyson finally producing products below its usual £350 benchmark. Admittedly, £250 is still a lot of money, but I can’t deny the instant shine I saw – none of which I’ve seen after using all manner of ghd and Cloud Nine-brand (to name but a few) straighteners. Another minor gripe is that I’m not a huge fan of the four heat settings. As Dyson has demonstrated with the nural hair dryer, the brand is capable of intuitively detecting the amount of heat your hair and scalp can manage, so I’d have liked to have seen something similar with the temperature control within the coolshine. Key specifications Temperature settings: Four, 145C, 165C, 185C, 210C Heat-up time: 15-seconds Weight: 200g, but the cooling attachment (85g) is removeable Cable length: 2.5m Colours: Ceramic pink, jasper plum and (for professionals only) steel violet Available to buy from: 15 September