Discount replacements have been around for decades. Some are quite good and a subset of the cottage industry that is phono stlyi has been established with the goals of actually improving upon the original. However, in too many cases the assembly of such components can be slipshod and the stylus doesn't come up to O.E.M. standards, in some cases even being fitted to the cantilever at an incorrect angle or bonded when the original had been nude mounted. It's a bit like the body shop using non-O.E.M. parts to repair your car.

I have no experience with the company you mention. Hopefully, they did a superior job at a fractional cost.