My remote works fine in terms of range. I'd like to take a small liberty to add another issue to this thread's topic.
The problem I have is with the "5 key". You have to press *hard* to get it to engage, and it makes a snap sound (as if it were a snap-type button on an article of clothing). It'll be fine for a few seconds, but then can require another very hard press after as little as a minute, and most always after around five minutes. No liquid, glue, or anything else has ever been spilled on it.