Opinions wanted on self-study courses

[kokopellime]

As I seek out learning resources, I've come across quite a bit on the Internet and it sometimes is overwhelming. I wonder if any of you have any experience or thoughts on the following:

-studyspanish.com- and their 'Camino del Exito' course

-spanishpod101.com- and their overall site

-spanishprograms.com- and their Visual Link course

-synergyspanish.com- and their product by the same name

These are but four, that I've narrowed down among several others, for possible purchase. Like most of us, I hope to avoid shelling out dollar after dollar on different programs. Just one 'preemptive" comment: I realize that I can learn without a formal course and many of the members of this community have attested to that approach. I'm all for that and incorporating a lot of those practices. My work as a community organizer (meetings and events day and night) inhibits my taking a formal class so self-study is the way. I'm seeking out a course to give me structure in the midst of all the things that frequently call for my attention.

If you know of any courses (online or CD/mp3) that employs Krashen's (I have a related post on his stuff in the Forum) Natural Approach to Spanish, that would be great. From the little I know, it occurs to me as an approach that appeals to my learning style. I’ve come across a lot of the theoretical stuff about his work but not a program or course using it.

Thanx!