Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Big disappointment

Major disappointment! This model is very poorly constructed. The screw connecting the sprayer control to the unit kept falling out. I had to keep having to screw it back on. Finally, it fell where I couldn't find it. I gave up and contacted the Gilmour people. The Gilmour service center was of very little help. Not worth the money, in my opinion.