I have two. If you are not paranoid about "batteries failing you" or have some $$$ to drop, there are definitely better 1X optics out there. I got the Prismatics because they are within my budget and last forever. Correct me if I'm wrong, but the Trijicon Reflex using tritium and fiber optic will eventually fail after about ten years or so (the fiber optic / tritium must be replaced)? They also have some brightness issues (I've heard) when shooting from a darker room to a brighter area?
Regarding speed, I found that it (Prismatic) is faster than my irons from high ready position - it is definitely faster for multiple targets / follow up shots***. My biggest peeve with the Prismatic is the large dot size. However, when I finally got the chance to use the optics out to 200 yards, it wasn't as bad as I thought. I could hit sillhouete targets consistently and to my surprise, quite easily - but with my skills, that's the farthest I'd do with my Prismatics.
***Note: I have mine installed on a flat top and on an A-2 with a fixed carry handle. With the fixed carry handle, the Prismatic was actually slower when employed from the low ready position than my irons for the first shot - I blame it on the "chin weld". I overcame this obstacle, however, by dry fire and then live fire drills. From high ready and for follow up shots and multiple targets, however, the Prismatic always won. With the flat top "M-4", the Prismatic out performs the irons consistently from the get go.
If I had to do it over, I'd have saved all of my pennies and got me a Night Force 1X - 4X. But I am done with optics and gadgets now because I am concentrating on ammo supply, so the Prismatics are here to stay.
Sorry for the long reply, but I hope this helps somewhat,