Disadvantage: - Brick your motherboard, then: - Buy a new motherboard - work out if there's a way to recovery flash it - buy a eprom programmer to flash the bios. Advantage: - For Activation? If so then Slic is always there & Vist/Win7 installs would appear genuine to MS. - No need for a loader, crack or patching. - Fix some stupid defaults. ie MS 970A-G43 default for Sata is IDE. Modded to default of AHCI is better. - Add your own cool Legacy and/or UEFI logo. - upgrade outdated option rom if required. - enable SLI on boards that only do Crossfire.