Its OK, if it not CRASHES a lot!
Update 2.0: Even the new version 2.0 is crashing, suddenly without no warning the app disappear (close) from the menu bar, so ya have to relaunch the app and do log in again, its so boring must say, well I gave it a second chance but, unfortunately it appears to be more seriously than a bug fix.
(P.S: Changed my Macbook to an Air mid 2015/El Capitan) the problem persist.
Version 1.9: Used to love this app, but since a month ago it started crashes a lot, I was considering to buy a PRO version (to attach files feature) but I step back, because its buggin me lately! Please fix it. (Macbook Air mid 2013/Mavericks).
Go MArk about MailTab for Outlook