My unit is an older model which is called "The Boss" but is the very same as this.  Mine has EXCELLENT suction and I don't mind that it is a little noisy.  Mine is used for cleaning up around the woodstove.  It does an excellent job of sucking up ash and wood particles of various sizes.  I don't understand the negative reviews, unless these people received "lemons".  I would highly recommend this vac for small jobs, I don't think it was intended to be used for  whole house vacuuming.