We have seen tons of different stick on tactile feel items for touchscreen devices lately, but the issue has always been that once you put on the sticker you cannot take it off after you have put them on. This tends to make your device much more unattractive and it will get in the way of some of it’s regular uses. The Kickstarter project by Joystickers has created a new more classical looking sticker which can be placed on and easily removed as many times as you want and as often as you want to. I think that this is probably the best set of tactile feel stick ons that have come out. Most of the other ones add actual buttons to your device rather than unappealing speakers.