My spouse and I used it recently. It's actually MUCH, MUCH faster and far less overwhelming than filling out all of the paper documents. You answer the questions, it puts all of your data into the right places on the forms. A lawyer looks it over to be sure there are no errors and that you're not missing any information (the forms are in no way self-explanatory) - for example, for us they caught a question that we had interpreted in a different way and allowed us to correct it to the right interpretation and relevant documentation. After that, they print, assemble and mail you the (hundreds of pages) packet, so all you have to do is check it over, sign it, attach the filing fees, and mail it off.

No power of attorney, no standing in for you, just a guide for a very complicated process. From what we've seen, it's generally intended for people who would otherwise DIY the process, but want a little more peace of mind that they're doing it right. It's not really meant for those with complex situations that need a lawyer.