No, it doesn't hurt. There's not much to rad just one number, so I suppose yes, it's easy to read.
it doesn't hurt. BUY IT NOW!! just do yourself a favor and buy it. Best investment you will ever make. Its an amazing trick, packs small plays HUGE. The legible writing is entirely subjective but ive never ever had an issue. Just trust me, buy it. After you do, hit my up in a PM and i'll give you some crucial tips to make it even better and more reliable.
It won't hurt for 99% of all people, and it is pretty visible.
This is definitely one of the most powerful tricks you can do, there is a reason is it a time-tested best seller.
Be careful thought if you have dark skin. It was a waste to me. The number doesnt show up as clearly. The trick is great just my skin thats the problem.