How can a tiny 5lb 750W servo motor possibly be more powerful than a 45lb 450W motor that came with my sewing machine? I don't know but it is 100% definitely stronger, and the install took 10 minutes, just had to remove 3 bolts, pop off old motor, then put on new motor using the same holes, and using the included bolts. Super easy. This thing is probably going to last about 5 years, so for the cost, I will definitely just replace it if it breaks.