I like the Pimsleur system, it works well, is easy to use. This particular "Quick & Simple" version consists of only 4 tapes, just enough to let you decide you want to learn more Spanish, so you can buy the more complete Spanish I.
If you are going on a trip and want to learn travel Spanish, get the Conversation version by Pimsleur, which has 16 lessons and will do much better.
Some of the reviews for this Quick & Simple version were originally reviews for a longer version that is now discontinued, and they were transfered to this less than filling version. The version that was discontinured was replaced later by the Converstional version.
The Pimsleur system works well, this version is just a light sampling of the language to see if you want to go further.