There are two Macs in my family. A 2007 2.2Ghz White MacBook with 320Gb HD and 4 GB ram and a 2010 15" MacBook Pro. I upgraded both to Lion. While the 2010 MBP is running it perfectly the 2007 MacBook seems to be strugling. It has constant spinning beach balls, mail crashes every few minutes, Safari takes at least a minute or 2 to open, and it is constantly dropping WiFi connection. It ran perfectly on Snow Leopard. I'm really regretting upgrading the 2007 MacBook. It also feels like the Lion experience on the MacBook is very hindered. It feels like half an OS on the MacBook and an amazing OS on the MacBook Pro. I understand that it doesn't have a multi touch trackpad, but it does have two finger capabilites. So why can't you use the page forward or back in Safari? It is just a two finger guesture on my MBP, so the MB should be able to do it. Also Airdrop does not work on the older machines when there really is no reason that it should not work. I think I am going to wipe the HD and restore it to Snow Leopard. Without the Multi touch and Airdrop ect.. it really doesn't feel very different then Snow Leopard, which ran way better on the older hardware then Lion does. Maybe most of the problems can be chalked up to bugs, but it seems a bit rediculous that Apple would say that Lion can run on older Core 2 Duo machines when in reality, it makes the machine worst then when it had Snow Leopard. Also to note, the 2007 MacBook had a complete restore of Snow Leopard done before upgrading to Lion, I did not want there to be anything bogging it down for fear that it would do exactly what it is doing now. The MacBook is my significant others, and it is used primarily for work. With all the problems Lion is causing, it is putting a big damper on productivity.