I'm a fairly satisfied Ubuntu 12.04 LTS user and I'm quite optimistic about the forthcoming changes to Ubuntu 12.10 Quantal Quetzal. But that doesn't mean they both are somehow "perfect" or something. Unity, which was a huge departure from the traditional GNOME 2.0 desktop, has been around just for an year or two. Though I generally like the idea, one gets easily frustrated because of bugs like these, Compiz crashes, slow loading launcher etc. To put it bluntly, when compared to rock-solid GNOME 2.0, Unity and the underlying GNOME 3.0 is not yet there in terms of performance or reliability. Ubuntu desperately needs the kind of attention-to-detail Android received with 4.1 Jelly Bean release.