No regret !!! Works perfectly with S Sketshbook on galaxy tab 8.4. For me, no latency, reaction immediately or I put the pen mine !!! The reactivity also depends on the tablet's power. Very nice finish, apparently solid (to do with the time), immediately recognized by the tablet of unpacking without special handling !!! I forgot, such as work with my Sony Xperia Z2 !!! So galaxy tab 8.4 S or Xperia Z2, eyes closed purchase. And one day premium delivery as agreed.