Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor design ruins otherwise good product

I purchased three of these MS-4350B tire gauges -- one for each of my vehicles. They arrived yesterday. They are going back today. I tried to make an air-tight seal, but regardless of how hard I pushed (and I tried it on each of my vehicles) I could not prevent air from escaping. I see where several other reviewers had some success by purchasing an O-ring, but I feel the manufacturer should make a product that works as advertised without me having to modify it for them.