I received this system free of charge for a honest review. This system is great. It has some great flavors such as Orange, Root beer, Kool aid, Crystal light, and even a Energy one. There is more than that. And all taste great. Another thing I like is you can put as little or as much carbonation as you like. You can also make your own syrup's to go with your soda stream.
When we first got the soda stream I was unsure about it. Though my husband was all about it. He was so excited to get to make his on soda's. And well the kids couldn't keep their hands off it. They were allowed to make one drink at dinner time and that was like a treat for them. When we ran out of the CO2 cartridge, we went and bought a new one right away.
So if you like soda but hate the cost this is the way to go. The only down side is it does not have all the flavors my family loves. And it can be a little cheaper. Though with my family this is a hit and we will use it for years to come. You can buy refilled CO2 cartridges online for about $15 instead of new ones for about $30.
Also you can do a search on soda stream and homemade syrup's and find some useful and some funny stories. So go get one for yourself or a loved one and have a fun family night.