They just have to sqeeze the damn ads in there. Why can't they think more like google and release it for free/ad free. It pays off in the end. Also Mail client.. thats gonna have a worst result then google going into Instant Messenger market.
I haven't played with it that much yet, but so far I really like it. It seems really customizable and the ability to preview the e-mails like in outlook is a big time saver.
I tried it the other night, it crashed firefox like 4 times and I decided to just write that one off. They are ruining their search engine with greed. I realize they have to make money, but, they are putting paid ads EVERYWHERE. Irritates me to no end.
My first impression is that it resebles a little bit of AOL's email client. Would try it out more though.