Pull down chain tensioner

Hi, just ordered a new iwis 83 link chain as I think mine is past its best & just wondered if any one has used either one of the green lth type or the black jockeys boxenstop pull down tensioners with a 19x47 sprocket combo to successfully take up the slack, I know the gt tensioner will do the job but l would prefer to use either one of these, thanks for any info 
