Fast shipping ! youll have to pony up more $$ after the fact to get it if youd like it. These have not rolled/moved around my foot during activity. They fit perfectly! All A/V streaming is affected; YouTube, mp4, Flash, etc. I purchased this product and have used for approximately 150 reps over a span of a month. The bottom line is that youd best talk to several supervisors (not just reps) to get the straight answer. There are 120 stops with a positive lock down that keeps it there for repetitive cuts. I really hope they stay charging this time because they are nice headphones for the money. Seemed to work the first week then everything went downhill from there.