Network render is great if you have more than one machine. All the new premium rendering effects and metaballs are another reason for bryce5. Being able to make your own preset folders and categorize your mats and obps is a really good reason for Bryce5. Bryce5 trees also use metaballs - all those other forest CDs etc use polygons and slow down your renders and your speed navigating thru the scene. Also as Aldaron said, you get much more variety with the bryce trees. Since they are native to Bryce you can use many more of them than polygon trees and they render faster. Bryce5 also works under the new operating systems like OSX and Windows XP. I like all those features of Bryce5 except for some of the interface changes ; ) Scott