I am more than thrilled and for 1.5 years! Since then I have purchased the Sodastream Crystal 1.5 years ago at WMF for me there is only mineral water! Recently I got my 2nd Sodastream Crystal (Mega Pack) for the work (99,90) and can now also enjoy there fresh mineral water. The glass carafes are super, can in the dishwasher if necessary and I taste the mineral water from gas cylinders personally better! Lid for glass carafes can be even ordered. Purification of Sodastream Crystal is a bit expensive, but if you do it regularly it comes relatively quickly (one would like any germs in drinking water have). The syrups I can not say anything because I have to lie here, but friends rave about the varieties of ginger ale, bitter lemon, Energy (diet) and Coke (Diet). The effervescence is easy: fill bottle to the mark with tap water, put in the bottle Sodastream and these include, repeatedly press and release the button and wait a few seconds. Finish :-)