So after my Wired Wii Sensor broke (that came with the system) I decided to buy a replacement bar. Unfortunately no store sold the Wired Sensor Bar where I live (Alberta). So I bought the Wired Wii Bar online from eShopic and it works! A great product that I would reccomend to people who want a replacement bar.
The bar does have better sensitivity and does work better in my experience. While it's not improved enough for you to want to buy it if you already have a bar, it is still a perfect replacment.