Good product, good ergonomics (very fine), but the male micro-USB socket ...

The micro-USB male plug is a problem. Look at its shape: it is wider than usual intake (I speak of course of the plastic part), which means that I have trouble inserting it into the socket of my Xperia Z1, I have to force a bit, and as long as I move the, decision can, while remaining plugged, no longer supply power to the phone. Embarrassing for me.
In addition, the trick to put the micro-USB socket in the location of the body of the battery is a bit difficult, you have to tighten the cable (fortunately not too much, no one has any more than the cable printing will sell!). But it is not fatal, provided for this product.
So good product but the first problem mentioned above.
And other buyers, what do they think? ^ - ^