Good, but not really superior to cheaper alternatives

+ The rotation mechanism of the protective caps is quite handy, so they can go, unlike many competitors barely lost.
+ The correction rollers are relatively large, but are well in hand. Haptic so I can not fault it, and this can be subjectively perceived differently, of course.
+ They do their job reliably and hide their own mistakes.

- Wei with all such products, the correction tape from the manufacturer by claiming to be "immediately overwritten" advertised. Of course, such statements should be treated with caution. If you proceed very carefully, usually fails not, but similar in Fine Lineren you should already wait.
- The price is relatively high.

Bottom line: If you need a supply of correction rollers which holds even in regular use, rather long, can strike you, but really think they are not compared to cheaper products.