If youre a bullseye type "target" or "group" shooter, youre probably not going to like them as much, or get the same precision you would the aperture type sights. If you shoot a little more realistically, and arent upset by baseball to large lope sized groups on targets without aiming points, you'll likely be fine with them.
Even with my now older eyes, I still have no troubles making good, rapid COM hits on silhouette/people targets out to 200+ yards from field positions with mine. Using my AR's or M1/M1A's etc, on the same targets, I get similar hits. Now if I shoot "bullseye" type targets, the difference is usually more noticeable, and the aperture type sights are usually the better choice.
Its been my experience that the people who bad mouth or complain about the AK's, usually havent spent any quality time with one to learn how to work and shoot them. They arent "AR's", and dont get run like them, although shooting wise, the principles are really all the same, head down and forward, nose to the top cover or charging handle. If you cant shoot an AK "reasonably" well, its usually not the guns fault.
I have forward mounted Aimpoints on a couple of AK's, and they do bring the guns into the 21'st century with things similarly equipped, like the AR's. Having and shooting both type rifles that are set up similarly, they shoot pretty much the same with the red dots to as far as you can hold them, assuming you understand the rounds.
Im not a fan of mounting scopes, or trying to make the AK's into AR's by moving the rear sight farther back and mounting a peep on it (among other things). The set ups Ive seen that do so, interfere with shouldering the gun, and getting a proper cheek weld and head position. Even if you were to get your head where it belongs, it looks like it would be painful and distracting to shoot.