Is this a good tool to post over 5000 listings with?

Before i buy I just wanted to know other peoples experiences with this tool…I will be selling pictures and have over 5000 listings maybe a lot more than that over the coming months…would GS be able to handle that sort of capacity from the standpoint of reliability of the software ie not crashing all the time and so on…to houskeeping ie: sorting through offline auctions ready to post or just general swaping out some for others…is this worth the investment?

Your experiences with any of this would be greatly appreciated.