The plastic bellow is a good unit.  We seldom have come-backs with this bellows as it is of very heavy gauge and still flexible.  The other advantage of this bellows is that it has inlet valves.  That means that it doesn’t suck air back in the exit hole, which blows into the smoker.  Why is that good?  There is less likelihood that there will be hot ash “suck-back” with this smoker, and hence not likely to burn holes in your bellows.  Also, before you first use your new smoker, make sure you pull out the trivet (the little round plate that sits in the bottom of the smoker to hold the fuel off the bottom and let the air come in) and flip the legs down, then replace it.  If the trivet isn’t up off the bottom of the smoker it will not work effectively.