Overkill for the "week end wrench" but it's the "bees knees" for the dedicated mechanic. No worrying about the jack moving, no working around the jack handle and the engine can be pivoted and swung without worrying about slipping off the block.
Getting ready to change out engine mounts on an '85 300SD. Still need to pull the fan shroud, air cleaner, disconnect the linkage, attach chain and put it on jack stands.