Instruct: Classify Amazon reviews into positive or negative sentiment
Query: KitchenAid KHM9PWH 9-speed professional hand mixer

My wife has purchased at least a dozen hand mixers of various (less expensive) types over the last 2 years, and has been unhappy with all of them. The problem is usually too fast of low speed or too quick of startup, causing certain things to froth or splatter. This is the only hand mixer she's ever had that she's been completely happy with.The Amazon purchase was relatively painless. The price was competitive. The order was completed online from the dining room while she was complaining in the kitchen about yet another brand-new 5-speed one she didn't like, and the shipment arrived in 4 days, with a weekend included.It's fun to make her happy, but usually requires a lot more effort than this.