A really high quality item that works exceptionally well. Highly recommended ... but
... I live in Northern Ireland and depend on Royal Mail to deliver the gas canisters which they refuse to do (dangerous substance!).
I tried other Amazon suppliers but all refused to post to NI.
I can only find the NO2 (nitrous oxide) cartridges locally but at 3 times the price!
Not withstanding this the iSi Gourmet Whip Plus is just great for making foams etc - I just can't get the CO2 cartridges to make fizzy drinks.