I am a fan of Minitek's extensions now. I needed a simple carousel for my client's website and what I found on Minitek's demo site was a beautifully designed and professional looking carousel. And even better, it's affordable with a standard subscription plan that won't break the piggy bank and allows you to re-use the extension on multiple sites. I liked the extensions so much that I went and bought more like Joomfolio, another instant favorite of mine.
Their sales and support are very fast when I had questions. So yeah, really nothing negative to say about their extensions.