For me not valid ... You need customized fingers, pierces the passage must be fixed and so for me, a bit narrow (although I have big fingers ...?!). Also, I think making a click, I did well and entant good one "click", and are two in a row that happen ... so virtually unusable on the internet for example ... Fortunately, the price is too high ... Here would also surprising that it is great for the price ... In short, I highly recommend as I doubt more and more of my area ... 8- (