I bought a 4-12 for a Browning .243 with the plain duplex reticle. Although it worked fine I wasn't really impressed with it. To my eyes it was like looking down a paper towel tube to the reticle. I ended up selling the gun with the scope to a buddy and he loves it to this day.
Ive seen some blow our pricing on the upper end Sigs. Some of the Tangos are very nice and made in Japan. Their entry level scopes just dont do it for me. IMO there are better value priced scopes.