See also
Twist on the Tarn Gorge
Repairing a huge rip

News of the new 3psi/ 0.2bar Gumotex Twists made of slicker, full-coat Nitrilon Light came out in 2015. Then in 2017 they dropped that fabric and returned to regular Nitrilon. Weights went up, so did the price, but the boats ought be bombproof which you could not say for the original models. (But see below).
The 3.60-metre x 83cm T2 double now goes for around £500 and weighs 13kg. The 2.6-metre x 79cm T1 (green, left) costs £400 and weighs 9kg. This >2018 model should have three pairs of D-ring seat mounts on the hull top. Now with the slick fabric coated on both inside and out, the boat ought to be tougher and will certainly be much quicker drying.

They have the usual removable and adjustable but rubbish seats which Gumotex is still famed for. I think it’s a way of getting through off-cuts of Nitrilon.
For long trips I’d ditch them to save bulk, weight and inflation, and fit lighter and much a more supportive SoT backband + packraft seatbase (below left), as I’ve done to all my Gumos since my Grabner Amigo.

The inflatable footrests are also a mushy pillows, either a simple pillow, or the extra rubbish, heavy, corrugated pillow (above left). Improve your Twist by ditching them too (cut up into useful Nitrilon patches), and fit a piece of hard PVC drainpipe for a proper hard footrest.