Good marker for only SMOOTH surfaces. Don't write on anything with texture or the nib will rip off. My nib was done after like the third tag and the first time using it. Not cool. Still a good pocket marker. I suggest getting a mini crusher cause the nib is way more tuff then regular markers(APREPLY) That pretty much goes for any felt style mop in all of graffiti history. Always carry extra nibs (they are cheap) and you will be just dandy.