[Repeater-Builder] 2 GM300 UHF Mobile Radios for Repeater

[Romy]

Sorry if this question might have been asked before already.
I am planning to use 2 GM300 Radios (M44GMC20D3AA) to build a simple repeater 
in a back to back configuration . For those who used this configuration can you 
please share any tips and ideas. How is the performance and reliability of this 
configuration? I am also planning to use the repeater on Echolink.