After comparing Tools offered by Seagate and WD, I must say that SeaTools is not good enough.
As a diagnostic tool, SeaTools should be stand-alone and not rely on .Net Framework 4.0, as target system may not have it installed. Furthermore, .net 4 require reboot after install, which is not acceptable in some scenerios.
SeaTools should be able to run without installation to speed up and simplify the diagnostic process.
Compatible version of SeaTools should be out before a new OS is released, not just "This software is not compatible with this version of windows." message reported by Windows itself.