Only useful for very specific needs.

Anticipation, if you own the Dymo LabelWriter 450 Turbo like me, you also want to try using other formats. Therefore, I have next to the really practical thermal label for label printers Address Label, 89 x 36 mm, white, suitable for a variety of other purposes, also equal to the folder labels narrow 38 x 190 mm ordered.
Can not fault the quality of the product. The print is clean, good adhesive properties and this type of thermal pressure keeps almost forever.

Only someone who has dozens folder labels print in one go, just for this role would be worthwhile. Although I worked in an office, this is almost never at me. To label every few weeks times 2-3 new folder does not pay the price and retrofitting effort by Dymo. Since I'd rather stay at the folder labels on sheets A4, of a comparable size are 7 labels on a sheet and the design goes well with WORD and the appropriate styles well out of hand.

Conclusion: If you must label a lot of folders back on a train and the LabelWriter has, is likely to be satisfied with the product. The others will be better off with the cheaper solution.

Addendum: In the meantime stands at my workplace a LabelWriter 450 Twin Turbo. Conversion is omitted and thus the unit price only remains to be considered, which is unfavorable for the folder labels than the Universal labels.