Those are generally the easiest to install. As for it being the best for your situation, a lot comes down to why you want to harvest rainwater.
- How much or how big of a system do you need?
- How much are you looking at realistically?
- How much space is available to hold the water?
For more information:
Read "I need advice about creating a bioswale or rain garden in my yard where overflow rainwater collects." a Q&A answered by Richard Heller.
Also, for more on the options available and sizing read this blog post by Sean Lintow.