I used it a lot on Outlook for Mac and it's still dreadful software, I could give long list a problems with it but I have to just lump it in with the quality I've come to expect from Microsoft, regardless - from the 50 odd feedback reports I provided, I never received a link to a bug report or any thanks for testing and reporting on their (expensive!) software and 5 years later it still performs terribly, uses an excessive amount of network activity when idle, fails to properly render HTML, inserts bloated HTML junk into emails, crashes, misses basic features, leaks memory and wastes screen realestate.