any good for what? agitation? low moisture? cleaning ya teeth
if you mean for agitation then there good, not the best by a long way but a lot better than a brush, and easier.
great on stairs too, for low moisture cleaning i'd say rubbish but then i'm not a fan of even the better host and enviro options,
for cleaning your teeth there brill and have the added benefit of grooming ya tash if you have one