I have never had an issue with any rings i have ever used regardless of price. Seekins, 2 lines of vortex, 2 lines of Burris, Leupold, Steiner, Talley, Weaver and cheap amazon rings... and probably a bunch of others that i can't remember. Never had a set of rings slide, loosen, or pinch the scope so that it damaged or hindered the elevation or windage. That said, only the cheapest set from Amazon were the lowest line of rings i have used and i have never used vertically split rings.
My favorite rings are the Burris Signature with the inserts, because of the flexibility. I have them on 4 rifles and they work beautifully.