Okay, let me put it a different way.

We just sold a customer a nice MX-500. When we went into the learn mode, it appeared to learn the commands from his existing TEAC CD player remote, yet it wouldn't actually operate it.

Yes, we offered a full refund, or a replacement remote that WOULD operate his CD player. No issues at all.....

Had he saved six bucks, or even twelve bucks, by purchasing online, he would have been in that rock and a hard spot place. Remote that doesn't do the job, and no GOOD warranty.