The Gravity Perks Limit Submissions plugin is a robust tool that enables various restrictions on form submissions based on user-specific criteria, field values, IPs, roles, and timeframes. Here's a rundown of its features:

1. Limit Who Submits: You can restrict submissions based on user, role, or IP addresses, allowing for tailored access control.
2. Limit What's Submitted: Control submissions based on specific field values or combinations. For instance, restrict repeated submissions of the same name and address or any other field combination.
3. Limit Where Forms Can Be Submitted: Apply submission limits per page, enabling the same form across multiple pages with distinct submission constraints.
4. Limit When Forms Can Be Submitted: Configure submission limits based on timeframes, such as one per minute, five per day, or a total limit over a defined period.
5. Combine Multiple Limitations: Mix and match various limitation rules to create intricate submission restrictions.
6. Custom Limitation Messages: Set custom messages using merge tags to inform users when they've reached submission limits.
7. Limit Reached Notifications: Notify administrators or users when submission limits are reached, leveraging Gravity Forms notifications.
8. Shortcode for Submission and Limitation Counts: Display submission statistics, including current, remaining, and total limits.
9. Developer-Friendly Options: Offers global feeds, multi-form collective limits, and well-documented hooks for advanced customization.
10. Automatic Updates and Support: Regular updates and comprehensive support are provided to ensure the plugin's functionality and assist users effectively.

With these features, the Gravity Perks Limit Submissions plugin offers extensive control over who, what, when, and where form submissions are allowed, providing a powerful toolset for managing Gravity Forms submissions effectively.