User Role Pricing

Hi, I am building a site that will have users with different discounts depending on their yearly spend with me etc. I have 5 groups, and for argument sake I’ll say there are their privileges:
Group 1 – 5%
Group 2 – 8%
Group 3 – 10%
Group 4 – 15%
Group 5 – 20%

I’ve just seen this: http://marketpress.com/product/woocommerce-role-based-prices/

But the description and general information aren’t great so makes me wary to fork out without testing!

Does anyone know of a solution?

Basically it would have a ‘My Account’ link at the top, that when logged in would change the pricing shown on the site to their prices…

Thanks,

Craig

http://wordpress.org/extend/plugins/woocommerce/