benefits of vbseo sitemap?

I installed this last week and it really looks promising. What sort of an impact can I expect? I've noticed some improvement in my google rankings, but I'm not sure if it's a direct result of the sitemap.

Hello,

you can expect deep indexing of your pages, this is what sitemaps are good for as far as I understood.
Also the bots will find your new pages/posts faster than before.

Check out the reviews forum (I have 2 in my sig as a matter of fact). You will see real live exmaples of what vbseo can do for you.

In 1 month's time,
I went from 12,000 SERP's to over a MILLION
I went from $10-$15 a day income to over $80 yesterday
I went from 1500-2000 uniques a day to over 8000 yesterday

I cannot speak highly enough about the product.