Had mine since about June. I love it. I prefer to drink plain seltzer water over tap, so this is perfect.... no lugging bottles home from the grocery store, no empty bottles to carry to the recycling center. I havve 4 bottles full of tap water in the fridge all the time. We are lucky we have excellent tap water.
FWIW, I paid $99.99 this summer... I didn't really shop around, so I'm not sure if I overpaid or what. Because we live pretty far from a store where I can buy cannister refills, I keep three on hand at all times. I can have one in the machine, one empty ready to return, and one other.
Honestly.... I love it. I know that some health experts are starting to talk about C02 carbonation not being healthy, but I'm not really worried terribly much about that right now.... but it might be something to think about...............P