Re: Angled foregrip, any opinions?
Try it. Practice with it. If you can operate better with it after doing the first two, keep it.
What kind of shooting/applications were you planning on using it for? Hunting, 3-gun, target shooting, just to try it?
Personally I feel better with my thumb almost coming over the top of the rail, or sometimes wrapped around the top when shooting multiple target drills. Just know that your front hand should be used for controlling exactly where your front sight post goes (your aiming hand). Your firing hand should be shouldering the rifle and holding it in place against your shoulder, while the front hand will help to aim and reacquire targets. Suffice to say that if the angled foregrip gives you better control of the rifle, it's what you should use.