I had a go at this a few years ago when I first saw them at Halfords, I couldn't get enough pressure from the bottle to fill the system on my Calibra at the time, it worked, but not for very long. I did take my old Corsa to ATS for a re gas, they found through the vacuum test that there was a leak (cracked pipe) and didn't charge me. They have the proper kit, I will be going back with my Spider soon to get that re gassed as Im sure its in need, even though its still just about working. Would recommend ATS.
Giulietta 170 MA TCT Business Edition/Spider 3.2 V6 Q4