I've had 3 HiLux CMR 1-4, only paid for 1.
The first lasted 29 days, the second ~6-8 months, 3rd ~6 months.
All three suffered the same failure. The seal for the ocular lens popped out, lost it's gas and fogged.
I haven't sent the last for warranty and don't think I will.
The glass and reticle are fantastic, I prefer it to my Viper PST. The zoom lever, I'd say is a must.
I really wanted this scope to work but after the 2nd failure (at a match) I said screw it. The 3rd was used until I got the PST.