It helped tremendously when we installed a new Master Clutch cylinder, in my sons pickup. At the time he was in a auto shop class and they couldn't get bleed the air out of the system. The master cylinder was high on the fire wall. It didn't take long to fix the problem once he got it home.

I'd say, if you frequently end up working on brakes, or the rapidly disappearing clutches, then it will likely come in quite handy. And depending on what attachments you might need, they are not that expensive.