Firstly, I paid the extra for the install, but I installed (I think successfully). Rather than get a refund, I'd rather use the credit to get help configuring my install. As far as I can tell the sitemap build peters-out every time I walk away. I have a rather large site, and I think I've set everything correctly. Additionally, I don't really know how to start a CRON job but the idea that I can set this and forget is very appealing.