And I will share my experience. I have two Terra devices: one older one for a threaded cylinder and the other newer one for a QUICK cylinder and a finger counter like they used to have in aeroplanes or coaches for counting travellers. I gas 5x 1 sec, I also like the way it scratches the gas in my throat, and I get between 67 and 72 bottles out of a gas cylinder, the last 3 of which are already poorly carbonated. I used to exchange bottles in my street for £20 each, plus a pass of 9 plus one for half price, but when the guy raised the price to £25 (the neighbour was supposed to be cheaper for "his own"), I now exchange close to work for £15 each, I have the same pass of 9 exchanges plus one for free. I bought the QUICK unit new last year, and the older one, which I repaired over a year ago, on a trial basis used, and I think I made a great decision. I don't count how much plastic I haven't produced in that time, but I can see it from the bin bags. I recommend.