Xantrex Xpower Powerpack Solar #852-2071

[lolobond]

I know this topic was discussed before, but my question is  what is your actual experience with the Xantrex Xpower Powerpack Solar #852-2071.

http://www.xantrex.com/web/id/245/p/1/pt/32/product.asp

I'm considering one, but I'm not sure if its worth the investment.

Thanks