I have been using LiSA for 2 years now without one problem. it absolutely is one of the best add on software programs I've allowed onto my Mac. Sometimes I just don't want to leave my email program open or I tend to be in the next room. In either of those instances, LiSA announces my arriving mail thru my speaker system and lets me know when I'm needed or wanted. I have been a believer and user for a long time and I am PATIENTLY awaiting the next release which will finally incorporate 3 different email addresses into one application. As it stands now, I have several emails and I use a workaround that the author suggested: I made 2 duplicates of the application folder. I use all 3 LiSA's at the same time but each one is responsible for a different email name to monitor. It requires having 3 LiSA's open and running at once but well worth it. You'd think with an app like this you'd run into conflicts having something like that configured, right? Wrong! All 3 work like a charm and that is a compliment to LiSA's coding and brilliant authors. That being said, I am a bit tired of having to keep all 3 around so I do look forward to that wonderful upgrade where it will only take ONE LiSA application to check and monitor all 3 emails! Who am I kidding, though? I'll still probably run multiple LiSA's because I have at least 6 addresses to keep an eye on and soon I'll be able to do it all! So yes, this is a rock solid app that is very functional, desirable, and down right fun.