I have tried a couple of red dot sights, and since you specifically asked about the Aimpoint, I have an Aimpoint 9000L and find the field of view too narrow for my taste. I ended up going with a Leupold VXIII 1.5-5 illuminated reticle instead and really like it.

I also have a Docter Optics red dot sight, and I really like it for short range shooting/hunting.