I've always had good luck with them. Currently all the scopes I own are lupys. The only "new" one I own is a 2-7 VX-1 I bought in a rush for my slug gun one afternoon when the frozen rain fogged my Ultra Dot. It's been on my .450 for about a year. That scope has seen about 100 rounds of 12 gauge slugs and 500 rounds of .450B, (including some pretty stout 300 and 350 grain loads), with no issues at all.
My .270 WBY has an old VX-III on it that has seen several hundred rounds, many hunts and many miles without any issues. I also have a scout scope on my truck gun that's had a hard life for many years with no trouble, and a 2X handgun scope that's been on 3 different .44 mags for many thousands of rounds with no issues.
On the other hand, I never had another brand of similarly priced scope last a single year without one problem or another.
BD