The best feature about this tool is that it has many useful features, like email threading which help you manage your emails much better than other tools I have used earlier. It also supports Gmail API so if you're not using Google Apps account this might be something for you to consider as well. Sometimes when there are too many options to choose from or need to use advanced functions in an email they can get confusing at times. If you want a simple but powerful mail client then I highly recommend checking out this product. We've been able to solve our problems with managing multiple projects and keeping track of them within one place. This includes project management, task tracking, status alerts etc.