Vertex, for 10+ years, serving the individual bowler and the pro shop. INCREDIBLE service. I have a 1/3 hp. original; they didnt offer 1/2 hp at that time.
After the warranty was up (2006), about 3+ years into my ownership, I heard a rattling sound. I sent them an email inquiring what I could do. Vertex told me to ship it to them. They fixed it like new, did not charge me a penny and shipped it back at their expense (Michigan to NJ, 32 lb. not cheap). It's been working perfectly ever since. That's 10 years of ownership and use, both my own balls and many friends.
That's service and quality!!