Been posting here over the last 24 hours of my Lion use and seen a lot of negative based comments about Apples newest OS and figured I would share some of the good stuff as well 
1. It's fuxing fast! Everything is silky smooth and feels like its been put into fast forward compared to SL.
2. Safari is a real browser. So far every gripe I had with Safari is fixed. Gifs play correctly and at full speed, sites pop in with great speed, reading list is great and I love the new download manager.
3. Mission Control is great once you adjust to it. At first I didn't get it. I wanted my old expose back. But after getting the gestures down on my track pad and mouse I love it. It's so nice to have everything right there, just make sure you enable the app window expose gesture if you have a pad, its off by default I believe. I made a post earlier asking if you could reorder the desktops but it seems to me it works like your iOS device, and the most recent used apps appears closest to the left and the less use stuff moves down the list to the right, works well once you realize whats happening and you treat it like swiping on a iPad with dev gestures turned on.
4. Full screen. I want more apps to support it! I never thought I would use this feature but it does make apps so nice to work in and swapping between them with a simple gesture works great. When you swipe over to an app that isn't full screen enabled yet, like iTunes, you really notice it and the app almost feels old and out dated.
5. Auto Correct. Best thing ever. I'm dyslexic and this is key for me. It seems to work better than the iOS version and I hope the iOS gets updated to it in iOS 5.
6. Auto resume windows. I'm still surprised every time I open up safari and I'm right back were I left off, so nice.
7. New finder. Not a ton has changed but the new look, AirDrop and the All My files works very well and it's nice to have a consistent new GUI.
This is just a few things I want to report out on. If you excited for Lion and want to be ready for it when it goes live I recommend you have a Magic Track Pad, it works ok with the Magic Mouse, but you really get the experience with the pad and gain almost double as many gestures to use with the OS.
1. It's fuxing fast! Everything is silky smooth and feels like its been put into fast forward compared to SL.
2. Safari is a real browser. So far every gripe I had with Safari is fixed. Gifs play correctly and at full speed, sites pop in with great speed, reading list is great and I love the new download manager.
3. Mission Control is great once you adjust to it. At first I didn't get it. I wanted my old expose back. But after getting the gestures down on my track pad and mouse I love it. It's so nice to have everything right there, just make sure you enable the app window expose gesture if you have a pad, its off by default I believe. I made a post earlier asking if you could reorder the desktops but it seems to me it works like your iOS device, and the most recent used apps appears closest to the left and the less use stuff moves down the list to the right, works well once you realize whats happening and you treat it like swiping on a iPad with dev gestures turned on.
4. Full screen. I want more apps to support it! I never thought I would use this feature but it does make apps so nice to work in and swapping between them with a simple gesture works great. When you swipe over to an app that isn't full screen enabled yet, like iTunes, you really notice it and the app almost feels old and out dated.
5. Auto Correct. Best thing ever. I'm dyslexic and this is key for me. It seems to work better than the iOS version and I hope the iOS gets updated to it in iOS 5.
6. Auto resume windows. I'm still surprised every time I open up safari and I'm right back were I left off, so nice.
7. New finder. Not a ton has changed but the new look, AirDrop and the All My files works very well and it's nice to have a consistent new GUI.
This is just a few things I want to report out on. If you excited for Lion and want to be ready for it when it goes live I recommend you have a Magic Track Pad, it works ok with the Magic Mouse, but you really get the experience with the pad and gain almost double as many gestures to use with the OS.