crimestopper transmitters

Can I ask what models of CS units everyone is having problems with? Personally I have only installed RS900, EZ90, RS830, RS999FM, RS999TW1, and RS999TW1. I haven't had any problems really with any of those... I contacted Crimestopper about this and here is what they said:

tbird2340 wrote: I’ve read some people saying that the newer Crimestopper models are having problems and needing the remotes reprogrammed to the brain often. Is this true?

Their Reply: Yes, we've had reported cases of one remote coming out of Sync with the main module. Sometimes the remote has to be reprogrammed to operate the system. This is not a problem with all systems. We don't know exactly what's causing the problem and haven't been able to duplicate it. However, our engineers are looking into solving the problem. We will have a solution very shortly and do whatever is necessary to service our customers.

tbird2340 wrote: Is this a certain model you are experiencing the problem with?

Their Reply: The RS-1301/3/4 have had limited reports of problems.