My only suggestion is that it should be written to work with Mootools, since that is what will be built in to future versions of Joomla.
-Easy to understand front end use
-Some good pre-configured settings
-Privacy mail system
-Nothing major that i found
I will not end up using this component because my client likes the back end of AdsManager better, but it is worth a look for anyone that wants a Native J1.5 classifieds system.