Moving the cursor around all the edges, not just the left side, displays nothing of the Unity Launcher
closed as too localized by Eric Carvalho, qbi, hhlp, LnxSlck, Andrea Corbellini Feb 8 at 15:56
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Many users are disappointed of Ubuntu 11 with Unity desktop. It's still buggy and slow. If you feel everything is slow, downgrade to Ubuntu 10 which is the most usable version. I believe things will work fine in Ubuntu 12 which will be released in April. You can tryout Luninux 11.10, which uses Gnome 3 instead of Unity. Luninux is a MacOS like and developped from Ubuntu, but a better working OS(See below). Download --> http://luninuxos.com/?page_id=18