most mainstream radios will serve you well.. (as long as they meet system requirements)
most end users are clueless to the what their radios can and cannot do, and same goes for the radio system itself.
They tend to blame their radios for every little thing.
most lack the training and/or the brains to use the thing properly.
PUSH the button THEN talk (better yet, push, wait (one one thousand) then talk)
talk across the microphone
too many have a mic on their belt or lapel and are talking no where near the microphone (head turned the other way)
and the resulting audio sucks ass and they blame the radio (same can be said for dispatchers)
they don't understand how the repeater works so the just push the button the same time or after they start to speak
and they wonder why the dispatcher or other unit is asking wtf they just said because they didn't hear the first part as it was cut off (missed) by the repeater.
the antenna is not a 'handle'
do not coil the mic cord around the antenna
just because the radio system was just put in 15 years ago and hasn't seen any maintenance (as well as all the end user equipment) doesn't mean it'll operate as new
(iow, if your dept values your safety, they'll have some sort of radio system maintenance program)
I've got a million more, (~)
eta: oh yeah, and there are those slackers that don't want to do a fucking thing on the job so they'll go hide somewhere and claim the radio wasn't working right and cause problems for everyone else.