Extremely disappointed with the quality of Nissin i40 flash. Purchased from B&H a little over a month ago and after just a few uses, the markings on the dials started to wear off all of a sudden (not gradually). I have contacted both Minox (Nissin distributor in the US) and B&H Photo. We'll see what happens. A quick google search reveals that this issue is quite common with i40 units. However, I am not aware of any product recalls by Nissin. This is an expensive, advanced level flash so it's quite frustrating.