I have a Crossfire I with the 1" tube picked up for $100. Glass is great (Im sure there is better), clear and bright. (although an OLD tasco from the 80's has the clearest picture and brightest, compared side to side with a Leopold and it was pathetic how much cleaner my Tasco Was).
It is mounted on a 338-378 Wby Mag with chronoed 300gn Berger OTM Hybrids flying out over 3000 Fps (Reaching close to 3100). It does have a brake and a good pad, and is a pleasure to shoot. So far about 20 rounds with the scope it is still fine and holding a zero.
Turrets are a bit hard to use. (Re Zero) but not objectionable. Scope is heavy, it is made of real steel, the turret covers are pretty thick. The paralax adjustment is WAY off. You have to look through the scope to get dialed in correctly.
I have not done any testing with the linearity of the adjustments or check to make sure the Mil Dots are in deed mils.
So far looking like a GREAT buy for 100
-Keith