I just installed this plugin and am populating our directory, and so far everything seems to work as it should. I haven't tested payment yet. I'm using Google Wallet now and will buy the PayPal module later if everything goes right.
The import/export feature was a little tricky for someone like me who is not used to using CSV, but once I got the hang of it, things started moving right along. Rather than using the form to create one listing at a time, I can use the spreadsheet and then upload them all in one go.
All in all, a great plugin.