Vimeo member HDSLR GEAR has a great review on the new gen TrustMT MatteBox. [Thanks Joel]. For those who are new to shopping for a MatteBox, this is a great video explaining options and features some lower end MatteBoxes will lack. Features such as a basic filter tray (Some don't have any. This has more than one), Rotating filter trays (important for CPLs or ND Grads filters), swing away arm (for faster lens changes), and quick rod mounts (not threaded to lens, so you don't have to worry about fit). When considering Features + Build Quality + Price in a MatteBox, the TrusMT brand always comes up in conversation. You can find the various TrusMT products at their store (click here).
TrusMT MatteBox, Follow Focus, DSLR Gear