I've been using my Kobra for 3 years now and it is still my favorite.
Last year I used a PK-AV for some time and although it is easier to find it's red dot fast while 'in action' I switched back to my Kobra for the remaining part of the DSR competition.
Have even tried a Posp 2.5-5x24 scope on some occasions when the targets were very small but finding your target fast with it is un-do-able.
So; you can't go wrong with a Kobra. The only thing I don't like is the fact that I had to order it in the U.S. and could not, like with the PK-AV and Posp, get it directly from the factory in Russia.
Greetings from Peet.