I must agree with the majority here......I own 2 Contenders on the word of a shooting pal,,,and I wish now I 'd researched them more,,,they're not the worst junk by any means but they leave a lot to be desired at the higher powers. My 3-12x40 on my 22 mag hasn't really been tested much over 100 yds and it shoots good groups at low to mid power,,the thing is at higher power it gets unclear (fuzzy) so I don't use it over 8 or 9 power.
My 4-16x50 on my 243 is clear up to 12 power then gets fuzzy after that. If I was to do it again,,,and I may,,the Elite series Bushnells are getting some great reports and I own a pair of Swift binoculars that are real nice so I could go that direction also.
You get what you pay for......I've seen it many times before and it's true. I'm just getting back into shooting and hunting after many years away from it,,and I never knew there was websites like this and others before I made my gun/optic purchases. So I listened to a pal cause that's what he owns,,,,and now I'm finding out what great info there is online.