Product review (3 stars): not for all
great concept but not in execution.  I got this trying to conserve the space between my dryer and wall but it actually added 1/2 an inch.  The piece that attaches to a standard vent hose doesn't clasp very well/easily.  If you frequently disconnect your dryer vent hose then this might serve your purposes.  However, it doesn't save space or ensure a tighter seal than a basic hose clamp.