First of all I want to say that I had an old Soda stream that was purchased wen they first came out. It still works but I found it difficult to screw on the bottle and to take off once carbonated.
I absolutely love my new Soda Stream Power.
It is so easy to put the bottle on the machine with the Easy Snap-Lock bottle insertion. I also love the electric one touch panel for making the carbonation the strength that you want it.Lastly I love that the light on panel stays on for approximately 30 seconds until the bottle is ready to be taken of the machine. No more Soda Stream baths from taking the bottle off to early.