guys is this sight any good?

IMO the sight is really good.  It is well made and has a good sight picture.  I have one on my SKS.  

I did not put the Mojo on my AKs because it was not quickly adjustable for range.  Once you set it in, it is there unless you move an allen screw.

For the Ak I prefer the Krebs sight.  It costs a few $ more, but replaces your existing sight, requires no sight in, and can be adjusted for range just like your origional.

It all just depends on what you are looking for in a sight.  

ober tell me more about the krebs sight plz?

Krebs web site with a picture and a little info.

www.krebscustom.com/CustomParts.html[

Great thread in the optics forum talking about it. Its as good an arguement to buy one as I can come up with.

www.ar15.com/forums/topic.html?b=4&f=56&t=56498

Krebs site states that their aperature opening is 3.9mm. The MoJo and Williams openings are 0.150".
3.9mm = 0.15354
Close enough for gubment, or AK, work and another reason to go with the Krebs.