Flagging helps with this somewhat, but that's dependent on high usage, which isn't the case in all areas. There is some automatic stuff that runs to filter obviously wrong things out, but I plan on looking more into that.
It would also be good if PadMapper could scrape addresses from the title of posts (or from within the post) when there is no (full) address link at the bottom of a Craigslist post. This might be a bit more tricky since the way some of the addresses are written can't even be interpreted by Google Maps.
I still found PadMapper to be the best way to find apartments in areas I wanted to live, and it is a lot clearer than HotPads and Google Property search. One thing that I would really love is a more complete map that shows transportation and amenities like Google Maps. I often found myself having to re-search the address on Google Maps to find out what was in the neighbourhood.
My experiences are still fresh in my mind, so feel free to contact me if you want some more feedback.
If there's no map link, it attempts to infer based on that other info you mention and classifies them as likely inaccurate. Frequently it's the map link that's wrong, since people often file it in re wrong sub-CL and CL seems to modify the map link based on that info.
I'd be really interested if there were aspects you liked (or didn't like) about the others you tried.
Thanks!