I'm with Hagar.
I suppose they might save you a minute or two in time here and there, but for the risk you take in using them, I'd never consider it worth it.
The problem with these kind of utilities is they work (well hopefully they work - it's not guaranteed) on a fixed set of assumptions about file structure.
These days, it's my experience that add-ons don't all use a uniform file structure. You can come badly unstuck.
(I'll refrain from leaping on my hobby horse about Gauge cleaning programs here...

)