Our old canister vac. after many years faithful years required us to look for a replacement. Not just any replacement, but one that met all off our needs--all of our preconditions. The were--"BAG" vs "BAGLESS", all the special attachments that make this such a versatile unit, auto rewind cord, and multi surface cleaning. Not easy to dins in todays market--but we did fins exactly what we wanted in the "ZING" and we could not be more satisfied with our purchase.