Yeah, it's very good!
So far I have installed...
Winterboard & Bosspaper (theme & wallpaper apps)
Five Icon Dock (gives you, unsurprisingly, a five icon dock)
SBSettings (handy little app which slides from the top when you swipe the status bar, giving on/off toggles for WiFi, 3G, etc., plus gives memory stats, process/task manager, shortcuts, ability to hide apps you don't ever use, etc.)
RedLaser (barcode scanner, which then IDs the barcode & searches Amazon & other sites for price comparisons).