Why did you pick this product vs others?:overall build quality is decent. These aren't machined perfectly and polished if you are putting it in your more showy guitars but overall quality isn't bad for the price. If you leave the cover on the back anyways it doesnt matter then how it looks. The two sides are machined pretty identical maybe a couple of twists off so one side looks just very minutely longer then the other to square it against trem block. Easy to adjust spring tension and length. They look decent but wish they spent like a few bucks more in laber to sand down the machining marks on the base plate which is a nitpick but would look so much cleaner that I’d think of putting these in my more expensive guitars. I will try other brands too to see how these compare with the more expensive trem stops.