I installed it this morning and although it started off pretty rough, its actually pretty good. Now I know its in Alpha stages, so there will be bugs. The rocky start came when the app crashed upon clicking the the button to write a new tweet. But after I restarted the app it worked fine.
I really like how pictures open up. Thw whole app looks so much nicer than the regular Twitter app on the Mac.
A couple issues I've noticed so far:
- Translate doesn't work yet. The option is there, but its faded out. So I hope its there in the full version.
- It doesn't sync up with the iOS app with tweets you have already viewed. For those with Tweetbot on both the iPhone AND iPad, you will know what I'm talking about. But I'm sure that will come in time.
I didn't have long to mess with it, but so far I'm liking what I see. I also noticed that the app will only be compatible with OS X 10.8 when the full version launches, according to Engadget:
http://www.engadget.com/2012/07/11/tweetbot-for-mac-arrives-as-free-alpha/