We all know that any release by Apple is something huge, this on the other hand was overall a disappointing release.
So, first you buy the install disc, paying US$9.95, US$29.00, or US$49.00. This is a great price to start off with, the $9.95 was a special promotion price for anyone that had bought a Mac after June 6th, 2009. If you had purchased Snow Leopard within a 90 period of your laptop purchase, then you would be able to get the $9.95 price. If you do not qualify, then the price is US$29.00 for a single user license, and $49.00 for a family 5 pack license.
The first major update was switching to 64-Bit. They have made all core applications(applications that ship pre-installed) 64-bit. What 64-bit processor does, is makes it read the binary digits much faster. Example: 32-bit processors could only read up to 4.3 Billion numbers, whereas 64-bit can read about 18.5 quintillion numbers. This allows it to read much more, and it also makes the smaller numbers more efficient, and faster to read. On the other hand, this is not such a big deal because most 3rd party programs do not run in 64-bit mode yet, so OS X is not able to utilize it correctly. Also, to even be able to notice a difference in speed, you need to have at least 4GB of RAM (Random Access Memory), and most computers have 1GB or less.
Another improvement is Grand Central Dispatch (GCD). While GCD is not anything that you will likely pay attention to, it is useful. What this does is utilizes the full amount of RAM that you have. It will send parts of RAM to 32-Bit and 64-Bit processors. This means that you can run applications in both 32, and 64-Bit processors at the same time. To make this useful, you will need to have a Mac with an Intel Core 2 Duo or better processor. If you do not know if you have it or not, follow these instructions:
Click the “Apple Menu”:

Click on “About This Mac”, Then Click “More Info”:

Look at the number of cores, and if it says “2″, then you are good!

The next big improvement, is to Finder. Finder is the main user-management system for disks, files network drives, and applications. This has now been utilized in order to work with the 64-bit processor. It also has been modified to work with Apple’s new Grand Central Dispatch. This makes loading times faster, like loading PDF Icons is now 1.8x faster, and with JPG icons is 1.4x faster. These are big improvements, especially when loading many pictures in your finder window at once.
Expose is a great improvement, probably one of the best on here. What it now let’s you do, is show all windows including the minimized ones! The minimized ones show up under a bar about 2/3rds down the screen. When Expose is active, ou can also click on an icon in the dock and it will show only the windows from that application. This can also be done by clicking and holding the icon in the dock. Everything is also organized a lot better, looks and looks neater because it is in rows.
The menu’s for when you secondary click something in the dock has been changed, so it is a lot easier to view, and navigate through the collapsing menu’s in it. Also, in stacks, you can now navigate through different folders right in the menu! This means that you won’t have to open up a new finder window to see what is in the folder!
The next big enhancement is QuickTime X. Named “X” because it is version 10. This brings big updates to QuickTime. One enhancement is that it now has the capabilities to record audio and video straight from your iSight, of monitor! This is great for anybody that is into Video Blogging, or just anyone that like to record random stuff to Youtube! The next feature of it is that it can stream video from HTTP’s. This means that you no longer have to have a special streaming server setup, and can instead just have it on your regular server. Another big improvement of it is that it looks so much better! They changed the playback menu, so now it looks much sleeker, and is more responsive than ever. The next visual improvement is the way that the actual player GUI disappears, and all you see is the video. This makes the look of it so much better, now it actually looks like a great video player, and not just a free one that you download off of the internet.
Overall, I don’t think that this should have been a whole new version of the Mac OS. Most of this could have just been downloaded through their Software Update application. They really should have included some more features to actually make this a good update.