Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Crazy Amazing

We have aFrancisFrancis! 201032 X1 Trio Espresso Machine, Redfrom illy and my wife uses it daily. She carefully cleans the outer surface and the steam arm, but NOT the innards. Twice now the steamer has clogged. Both times I've used this decalcifier by running it through the system and voila - good as new. I'm hoping we regularly use this product rather than waiting until it's completely clogged as it took two bottles to clear our last one. This stuff is GREAT. Price at Amazon was low compared to retail.