Slow as hell (takes minutes to open on the fastest iPhone).
Useless notifications (shows no info or clue about why it rings, when it does).
Looks like the web in 1996.
Have to manually synchronize every mail folder individually, takes loads of phone space (way more than the native apps).
Graphics flicker at every action
Seriously...
This app is the biggest productivity loss I can think of. Its just as bad as having no access at all.
Alkama about Good for Enterprise, v2.4.1