I have the Wilson MLU chest protector and it has been like body armour. I've taken 3 directly to the chest and haven't felt a thing after the fact- maybe a little red mark if anything. It's cheaper than the west vest platinum and offers almost the same protection.
It's a little big, so if you're a smaller guy, it might not feet as nicely on you, but it's still a good buy.
Note: Bicep guards are removable (which i do remove mine).