I have also used a few other pieces of software from JoomDonation and I now always check to see if they have the software that I need for my current projects. Everything that I have used works exactly as I have needed it to.
The support has also been very fast and effective. The have gone the extra mile to make sure that their product is working right on my site.
Overall: Excellent, Highly Recommended
As for the product, it does exactly what it says it will and does it well. There are not a ton of pretty frills, it just works, and works well. The code is also clean and nice to work with if you are looking to make changes to the display. I was able to make the tweaks that I wanted with very little difficulty and no issuses digging through too many files or ugly code.
Overall, very well done. I will definiately be using this any time I integrate twitter.
Yesterday I emailed support for an issue I was having and this morning, rather than just giving instructions on how to do what I needed, there was a full update to the package that had added features to accomplish exactly what I needed. I am not sure if that was done for me or if I just got incredibly lucky with the timing of my request and the timing of an update, but it was great.
The only negative that I have is withthe image CAPTCHA. I love the feature and it is what I always use, but it does dramatically increase page load time on the pages where it is being used.
Overall excellent product.