The most reasonalbe priced…get the job done.. for pressing your seams open (trust me, not every seam needs to be opened, but we must distribute that bulk)…there are new pressing tools with wool on them ?  OK…but it is bulky, pricey and these work just fine…I love the 18″ and the 45″.  I don’t think you need one in every size…but if you think you do…go for it .