Aside from being a well crafted extension for Gmail, the developer goes above and beyond to support his work. Just recently, due to a change in Gmail code, the extension stopped working. Unlike the whiny crybabies that only come here and give a 1-star review without taking any steps to resolve the issue on their own, I went to the developer's support page where I found that not only had he identified the problem, but was working on a resolution. The issue is mostly fixed and available for download through GetSatisfaction or Facebook. Feedback is being collected on these beta releases as the update is fine-tuned for a final release.
For all you complainers, please note that in the instructions above where you entered your bug report is this second bullet point: Please do not post bug reports in reviews. We do not make your email address available to add-on developers and they may need to contact you to help resolve your issue. See the support section to find out where to get assistance for this add-on.
So, before you gripe about a bug in FREE software, try to look less a fool and READ the instructions and try to be proactive and look for a resolution on your own.