I have 2 of them. The $259 msrp and $199 “normal” prices are a bit optimistic IMO. Pretty sure I bought mine for $130 from PSA and that’s really where this sight fits in the market, right there with the Crossfire, PA Micro, Sig Romeo5, Holosun, etc. For $100, you’ll be very happy with it.
What I don’t like about mine is the dang rubber cover. The lens covers always get in the way and while they’re designed to snap together on the side, they don’t. You can remove the whole cover or cut the lens caps off but then no protection. The AA battery is integrated into the mount so you can’t use standard T-1 type mounts, not a big deal for me. It can’t be mounted in the low position for say a CZ Scorpion, only on the provided riser mount.