(Sparrow users) How's the new version of sparrow?

I decided to give Mail.app a chance when i updated to ML so, I didn't installed sparrow.

Today I decided to go back to sparrow since I like the interface better. Went to the app store to re-download and notice a lot of negative reviews (mostly of 100% cpu usage, crashing, growl notifications not working) of the latest version.

So I want to know from users who have the latest version running if in fact the app its having these problems or is it just random cases.