Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gilmour 9400 TEAL Electronic Water Timer

I have owned 2 of them for about 3 years now. If you need to control watering more than once a day and don't want water hammer. This IS the unit for you. I have used them and left them outside throughout the gardening season. They are a sealed unit. Require 4 AA batteries. You can control up to 4 programs a day. You can skip days, skip to water every 3rd day or pick the day you want the system to water. It is great. I don't have to worry about watering in the morning or afternoon. I would recommend this to ANYONE. Might be a little pricy depending on where you buy it but if you want a reliable unit this is it. Never had any problems with it. You can remove the control unit to program without disconnecting the hose. AAAA+++