Things to keep in mind:

Review Spinner is a Wordpress Plugin.

EZ Empire Builder and YellaBot sold separately (optional).

Review Spinner has been tested on Wordpress 3.01 and newer.

Review Spinner performs best with PHP version 5 or later.

Review Spinner PRO accepts EZ Empire Builder Tokens.

Spinning is not required.

You can create unlimited 5-star rating categories.

Star rating feature is jquery based.

Run in Review mode or Comment mode.

Users and user avatars created automatically.

Female and male users.

Control how often avatars are used.

Use WP default avatars or upload your own photos.

Decide number of reviews per page.

Reviews can be dripped out over time.

Auto review star ratings (1-5 stars) can be % weighted for natural results.