Best rated auto dialer solutions - what's your opinion?

Hey G2 community, I’m exploring the best-rated auto dialer solutions to boost outbound calling efficiency and improve sales team productivity. After reviewing various platforms, here are some top-rated auto dialer solutions that stand out:

• Nextiva: Nextiva offers a full VoIP service with built-in auto dialer tools. It works smoothly with CRMs like HubSpot and Salesforce, making it easier for sales teams to stay efficient and focused.
• PhoneBurner: Known for its power dialing features, PhoneBurner helps sales reps make more calls in less time. It includes voicemail drop, call tracking, and call logging to support outbound teams.
• Five9: Five9 is a cloud-based contact center platform with strong predictive dialing, real-time analytics, and CRM integration. It's a great option for teams ready to scale outbound efforts.
• RingCentral: RingCentral’s Engage Voice offers both predictive and preview dialing options. It’s easy to use and connects with most CRM tools, helping teams manage outreach campaigns smoothly.
• JustCall: JustCall is a simple, cloud-based system built for small to mid-sized teams. It includes auto dialing, call recording, CRM syncing, and call analytics, all in one place.

I found these while browsing G2’s auto dialer software category. If you’ve tried any of these, I’d love to hear your thoughts, especially around ease of use, setup, and how much they helped your sales team.