The delivery was faster than expected - a day later I had it already. The propellers were in a small bag in a completely flat package that has easily fit in my mailbox - you can also order so if you're just not the time of delivery at home.
On flight behavior has not changed much, I as a layman would say the propellers are of Performance-wise with those from Revell almost identical, but only almost. If you buy them yourself, you should replace all equal 4 propellers, as these are a few millimeters in diameter shorter here and the quadricopter with two different propeller types probably atrocious flies.
All in all I am very happy with this purchase and it calms me very happy to know that I now have to worry about me, if me again breaks down a propeller with a daring crash.