Airmail really shines in three areas. First, the basic email features are easy to use, so the novice can be up and running in a short amount of time. Second, its a powerful application, meaning it can do quite a bit. Those with multiple email accounts will quickly see the benefits. The rules feature is probably my most used, as it allows me to move sent messages from one email account to another. Ive also set rules to hold on to promotional emails for 45 days and then delete them, which helps to unclutter my inbox without losing that recent 20% coupon from Bed Bath and Beyond. Third, Airmail has great customer support, and you can generally get an answer by chat within a few minutes (thanks to David for being so responsive). As a bonus, airmail works the same over multiple devices on multiple operating systems, so that also reduces the learning curve.