|Decide on process and resources (7)|
|Decide on process and resources with them (14)|
This is very cost-effective for doing just the will, but doesn't include a living-will (or "health care directive") nor a power of attorney.
So I'd be more inclined to get their WillMaker-Plus which includes those other documents.
(Unless you have a Mac, in which case you can't use WillMaker unless you run BootCamp, etc. In that case I'd be inclined to use this Nolo online service for the will, then handle the others through free/cheap standard forms.)